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Which of these human body organs can grow back if some of it is removed?

• Brain
• Heart
• Liver
• Eyes

The liver is the only organ in the human body that can regenerate. However some patients who have a diseased portion of their liver removed are unable to regrow the tissue and end up needing a transplant. Researchers from Michigan State University believe blood clotting factor fibrinogen may be responsible. For most patients with liver disease, a surgeon can perform a liver resection and remove the diseased portion of the liver.

Source: Genome British Columbia

In medicine, which part of the body is affected by 'fallen arches'?

• Teeth
• Feet
• Skin
• Eyes

Fallen arches affect the feet because they cause a condition called flatfeet, in which the arches on the inside of the feet flatten when pressure is put on them. When people with flatfeet stand up, the feet point outward, and the entire soles of the feet fall and touch the floor. Flatfeet can occur when the arches don't develop during childhood. It can also develop later in life after an injury or from the simple wear-and-tear stresses of age.

Source: Mayo Clinic

On which day of the week is the rate of heart attacks allegedly highest?

• Mondays
• Fridays
• Wednesdays
• Sundays

In several studies of various populations over the years, scientists have found that deaths from heart attacks follow a pattern during the week. They occur at their lowest rates on weekends, jump significantly on Mondays, then drop again on Tuesdays. It found that the risk of a heart attack was about 20 percent greater on Mondays for adult men and 15 percent greater for adult women.

Source: NY Times

Which of these body parts doesn't have blood supply?

• Cornea
• Palate
• Ear
• Brain

As well as the evident 'dead' cells, such as your hair and nails, there is one area of living cells that doesn't use a direct blood supply. The only living cells in the body that aren't directly served by blood vessels are those of the cornea in the eye. Instead, oxygen and nutrients diffuse directly from the tear fluid on the outside and the aqueous humor (the thick watery substance between the lens and the cornea) on the inside, as well as along the nerve fibers connected to the cornea.

Source: Science Focus

Which of these parts of the human body never stop growing?

• Nose and ears
• Tibia and fibula
• Femur
• Humerus

Once the growth of the rest of the human body has slowed to a stop, the nose and ears continue increasing in size. Our noses and ears are unique compared to the rest of our bodies because they’re composed of soft tissue enveloped in cartilage. And it’s this soft tissue that keeps growing throughout our entire lives. If you’re wondering why hair and nails don’t make the list of body parts that don’t stop growing, there is an explanation for that too. Hair and nail growth is genetic and differs for everyone; for instance, baldness is hereditary. While continued ear and nose growth is consistent, the situation of hair and nails can vary.

Source: The Healthy

Which of these body parts are mostly made of keratin?

• Nails
• Muscles
• Veins
• Bones

Keratin is a protein that helps form hair, nails, and your skin’s outer layer (epidermis). It helps support your skin, heal wounds, and keep your nails and hair healthy. Keratin provides support and protection to your body. Your hair, nails, and skin rely on the amount of keratin in your body for their overall health. Your glands and organs also contain keratin. Keratin is strong, so it won’t dissolve in diluted acids, alkalines, solvents, or waters. Your body has many chemicals in it, and none of them affect keratin.

Source: Cleveland Clinic

Where in the body is it common to find "split ends"?

• Hair
• Teeth
• Nails
• Facial pores

Split ends happen when the ends of your hair become dry, brittle, and frayed. They may resemble the end of an unraveled rope. Exposure to extreme weather conditions, and hair care techniques such as blow drying, straightening, and curling may cause split ends. They’re also caused by chemical hair products. With so many people using hair products daily, split ends are common. Almost everyone will deal with split ends at some point.

Source: Healthline

Which organ of the human body controls the sense of balance?

• The ear
• The eye
• The nose
• The mouth

The ear is the organ in control of the sense of balance. Inside the inner ear is the vestibular system, which is essential for our sense of balance and postural equilibrium. It also coordinates the position of our head with the movement of our eyes. It's made of three semicircular canals, with a space at the end, filled with fluid and small hair cells. Whenever we turn our heads, the inner ear turns along with it, moving the fluid inside and bending the sensory hairs. These hair cells then send information to the brain.

Source: National Library of Medicine

Where would you find marrow in our body?

• Inside the Muscles
• Inside the Bones
• Inside the Gut
• Inside the Brain

Bone marrow is the soft, fatty tissue inside the bones in your body. Bone marrow contains cells that produce blood cells and platelets and it is responsible for making billions of new blood cells each day. Bone marrow makes nearly all the components of your blood. It's responsible for creating billions of red blood cells daily, along with white blood cells and platelets. Bone marrow also stores fat that turns into energy as needed.

Source: Cleveland Clinic

Ridges on which part of the body can be used for identification?

• Fingers
• Wrists
• Neck
• Ears

The fingerprint is an impression made by the papillary ridges on the ends of the fingers and thumbs. Fingerprints afford an infallible means of personal identification because the ridge arrangement on every finger of every human being is unique and does not alter with growth or age. Fingerprints serve to reveal an individual’s true identity despite personal denial, assumed names, or changes in personal appearance resulting from age, disease, plastic surgery, or accident. The practice of utilizing fingerprints as a means of identification, referred to as dactyloscopy, is an indispensable aid to modern law enforcement.

Source: Britannica

Which of these muscles is crucial for breathing?

• Biceps
• Quadriceps
• Deltoid
• Diaphragm

From a functional point of view, there are three groups of respiratory muscles: the diaphragm, the rib cage muscles, and the abdominal muscles. Each group acts on the chest wall and its compartments, i.e. the lung-apposed rib cage, the diaphragm-­apposed rib cage, and the abdomen. Contraction of the diaphragm expands the abdomen and the lower part of the rib cage (abdominal rib cage). The rib cage muscles, including the intercostals, the parasternals, the scalene, and the neck muscles, mostly act on the upper part of the rib cage (pulmonary rib cage) and are both inspiratory and expiratory. The abdominal muscles act on the abdomen and the abdominal rib cage and are expiratory.

Source: National Library of Medicine

Which part of the brain controls the right part of the body?

• Right
• Left
• Front
• Back

The cerebral cortex is divided into two halves or hemispheres. It is covered with ridges (gyri) and folds (sulci). The two halves join at a large, deep sulcus (the interhemispheric fissure, AKA the medial longitudinal fissure) that runs from the front of the head to the back. The right hemisphere controls the left side of the body, and the left half controls the right side of the body. The two halves communicate with one another through a large, C-shaped structure of white matter and nerve pathways called the corpus callosum. The corpus callosum is in the center of the cerebrum.

Source: Hopkins Medicine

Which body system fights off disease?

• Respiratory System
• Immune System
• Cardiovascular System
• Endocrine System

The immune system is a network of biological processes that protects an organism from diseases. It detects and responds to a wide variety of pathogens, from viruses to parasitic worms, as well as cancer cells and objects such as wood splinters, distinguishing them from the organism's healthy tissue. Many species have two major subsystems of the immune system. The innate immune system provides a preconfigured response to broad groups of situations and stimuli. The adaptive immune system provides a tailored response to each stimulus by learning to recognize molecules it has previously encountered. Both use molecules and cells to perform their functions.

Source: Wikipedia

Where in the human body is the smallest and lightest bone located?

• Feet
• Nose
• Ear
• Hand

The stapes or stirrup is a bone in the middle ear of humans and other animals which is involved in the conduction of sound vibrations to the inner ear. This bone is connected to the oval window by its annular ligament, which allows the footplate to transmit sound energy through the oval window into the inner ear. The stapes is the smallest and lightest bone in the human body and is so-called because of its resemblance to a stirrup.

Source: Wikipedia

What is the only human bone that is not attached to any other bone?

• Hyoid bone
• Tibia
• Coccyx
• Patella

The hyoid bone is a horseshoe-shaped bone situated in the anterior midline of the neck between the chin and the thyroid cartilage. At rest, it lies between the base of the mandible and the third cervical vertebra. Unlike other bones, the hyoid is only distantly articulated to other bones by muscles or ligaments. It is the only bone in the human body that is not connected to any other bones nearby. The hyoid is anchored by muscles from the anterior, posterior, and inferior directions, and aids in tongue movement and swallowing.

Source: Wikipedia

Which of these organs is found in females but not in males?

• Appendix
• Ovaries
• Liver
• Pancreas

The female reproductive organs are the vagina, womb (uterus), fallopian tubes and ovaries. Hormones secreted by the ovaries and a small gland in the brain called the pituitary gland control the menstrual cycle. The average menstrual cycle is around 28 days. After a period, rising levels of the hormone oestrogen help to thicken the lining of the womb (the endometrium). At mid-cycle, an egg is released from one of the ovaries (ovulation).

Source: Medical News Today

What body part carries signals from the brain to the rest of the body?

• Spinal cord
• Carotid arteries
• Cerebellum
• Trachea

The spinal cord is a long, tube-like band of tissue. It connects your brain to your lower back. Your spinal cord carries nerve signals from your brain to your body and vice versa. These nerve signals help you feel sensations and move your body. Any damage to your spinal cord can affect your movement or function. People often refer to the spinal cord and vertebral column together as the spine. Your spinal cord is a band of tissues, nerves, and cells. A protective layer of bone called the vertebral column covers and protects your spinal cord.

Source: Cleveland Clinic