Human Body Functions

Heart: Pumps blood around the body as the heart beats.

Brain: controls thought, memory, emotion, touch, motor skills, vision, breathing,
temperature, hunger, and every process that regulates our body.
Lungs: Give enough supply of oxygen to the different parts of the body and get rid of the
carbon dioxide and other waste from the blood.
Liver: Produces and excretes bile (a yellowish liquid) required for emulsifying fats and
helps the absorption of vitamin K from the diet.
Kidney: Removes waste and extra fluid from the body. Your kidneys also remove acid
that is produced by the cells of your body and maintain a healthy balance of water, salts,
and minerals – such as sodium, calcium, potassium, and phosphorus – in your blood.
Esophagus: Allow the passage of material from the mouth and throat to the stomach.
Nose: To humidify, warm, filter, and act as a conduit for inspired air, as well as protect
the respiratory tract through the use of the mucociliary system.
Legs: Help us stand, walk, run, and jump while also supporting our weight and
maintaining balance.
Arm: Help you with small, precise (fine motor) movements, such as wiggling your
fingers or fastening a button.
Thigh: Allow the lower body to bend, flex, and rotate. They also keep the hips and legs
aligned.
Rib cage: Protects vital organs such as the Heart and the Lungs.
Ribs: Aid respiration.
Spine: Gives your body structure and support. It allows you to move freely and bend
with flexibility. It also protects your spinal cord.
Stomach: Stores food and releases it to the intestines at a rate whereby the intestines
can process it.
Skull: Protects the brain.
Small intestine: Breaks down food, absorbs nutrients needed for the body, and gets rid
of unnecessary components.
Large intestine: Absorbs water and salts from the material that has not been digested
as food, and get rid of any waste products left over.
Arteries: Carry oxygen-rich blood from your heart to your body.
Capillaries: Exchange of materials between the blood and the tissue cells.
Veins: Collect oxygen-poor blood throughout your body and carry it back to your heart.
Right atrium: Receives poor-oxygen blood from the body and pumps it to the right
ventricle.
Right ventricle: Pumps blood low in oxygen to the lungs.
Left atrium: Receives blood full of oxygen from the lungs and then empties the blood
into the left ventricle.
Left ventricle: Pumps oxygenated blood to the body.
Inferior vena cava: Carries oxygen-depleted blood back to your heart from the lower
part of your body.
Superior vena cava: Carries oxygen-poor blood to your heart’s right atrium.
Pulmonary veins: Collect oxygen-rich blood from your lungs and carry it to your heart.
Pulmonary artery: Carry oxygen-poor blood from your heart to your lungs.
Aorta: Carries blood from the heart to the circulatory system.
Pulmonary valve: allows deoxygenated blood to leave the right ventricle and flow to
the lungs via the pulmonary artery.
Tricuspid valve: Controls the flow of blood from your heart’s top chamber (right
atrium) to the bottom chamber (right ventricle).
Bicuspid valve: Allows blood to flow from the left ventricle (pumping chamber) to the
aorta and prevents blood from flowing backward.
Aortic valve: Ensures that oxygen-rich blood does not flow back into the left ventricle. It
also lets blood flow from your left ventricle to your aorta.
Nervous system: coordinates its actions and sensory information by transmitting
signals to and from different parts of the body.
Bones: protect the various organs of the body, produce red and white blood cells, store
minerals, provide structure and support for your body, and enable mobility.
Circulatory system: provides oxygen, nutrients, and hormones to muscles, tissues, and
organs throughout your body.
Neck: Connects the head with the torso, supports the weight of the head, and protects
the nerves that carry sensory and motor information from the brain down to the rest of
the body.
Eyes: Provide living organisms with vision, the ability to receive and process visual
detail, as well as enable several photo response functions that are independent of vision.
Eyes detect light and convert it into electrochemical impulses in neurons.
Tooth: used to break down food.
Blood: delivers necessary substances such as nutrients and oxygen to the cells, and
transports metabolic waste products away from the same cells.
Digestive system: breaks nutrients into parts small enough for your body to absorb and
use for energy, growth, and cell repair.
Lymphatic system: Keeps body fluid levels in balance and defends the body against
infections.
Excretory system: Filters your blood to remove wastes that could be harmful to your
body.Skeletal system: gives the body its shape, allows movement, makes blood cells,
provides protection for organs, and stores minerals.
Muscular system: assists in body movement, posture maintenance, and blood
circulation.
Respiratory system: Equalizing the partial pressures of the respiratory gases in the
alveolar air with those in the pulmonary capillary blood.
Reproductive system: to ripen and release an egg at regular intervals, and, if the egg is
fertilized, to protect and nourish the embryo and fetus.
Integumentary system: body temperature regulation, cell fluid maintenance, synthesis
of Vitamin D, and detection of stimuli.
Endocrine system: helps control mood, growth, and development, the way our organs
work, metabolism, and reproduction.
Triceps: fixate the elbow joint when the forearm and hand are used for fine movements.
Biceps: elbow flexion (curling the arm up and down), forearm supination (turning the
arm in and out), and, to a lesser extent, shoulder flexion.
Hip: supports the weight of the body and is responsible for the movement of the upper
leg.
Ear: Hearing and body balance.
Skin: Protection against microorganisms, dehydration, ultraviolet light, and mechanical
damage.
Nails: help pick things up, pick things off, and hold tightly onto things.
Hair: keeps us warm by preserving heat.
Knuckles: allow us to bend/flex and spread our fingers.
Pineal gland: to receive and convey information about the current light-dark cycle from
the environment via the production and secretion of melatonin cyclically at night (dark
period).
Thalamus: relay sensory information to the cerebral cortex with the exception of smell.
Brainstem: cardiovascular system control, respiratory control, pain sensitivity control,
alertness, awareness, and consciousness.
Cerebellum: influences motor control by projections to brainstem structures like the
vestibular nuclei that in turn affect movement.
Hypothalamus: electrolyte and fluid balance, blood pressure, body temperature, body
weight.
Spinal cord: It carries messages to and from the brain via the network of peripheral
nerves connected to it.
Amygdala: regulates emotions, such as fear and aggression.
Pituitary gland: regulates growth, metabolism, and reproduction through hormones
that it produces.
Meninges: protect your CNS (Central Nervous System) from trauma injury to your
brain.
Basal ganglia: motor control, as well as other roles such as motor learning, executive
functions and behaviors, and emotions.
Cerebrum: initiates and coordinates movement and regulates temperatures.