Function of the Nervous System

The function of the nervous system is to transmit signals to different parts of the body to tell them what to do.

Nervous System

Brain-Controls motor function and the bodies ability to balance and interpret information.

Brain stem- Controls flow of messages to the brain.

Ear- Sound goes through the pinna into the eardrum so we can hear wave lengths.

Eye- Nerve signals are travel from both eyes and correspond with optic nerves to the back of the brain.

Peripheral Nerves- Control sensation, movement and motor cordnation .

Olfactory Cells-Specialized to allow someone to smell odors.

Spinal Cords- Connects peripheral nervous system to the brain and transmits sensory neurons to the brain.

Taste Buds- Allow a person to taste different flavors.

Brain Brain Stem Ear Eye

Peripheral Nerves Olfactory Cells

Spinal Cord Taste Buds

Nervous Sytems Fun Facts

There are more nerve cells in the human brain than there are stars in the Milky Way

Your nervous system cannot function properly in the absence of potassium and sodium ions. 

There are 100 billion neurons in your brain alone

Excretory System

The function of the Excretory System is to eliminate waste products in the body formed by homeostasis.

Bladder- Urine is stored in the bladder until it exits the body.

Kidney- The function of the kidney is to extract waste from blood, form urine, and aid other important bodily functions/

Ureters- The function of the Ureters is to carry urine from the Kidney to Bladder.

Urethra - The Urethra carries urine from the bladder to the outside of the body.

Bladder

Kidney

Ureter

Urethra

Excretory System Facts

1.) You can live a healthy life with one kidney

2.) The Bladder is around the same size and weight as the brain.

3.) The average person urinates 3000 times a year

4.)Your bladder can hold up to 24 ounces of fluid.

5.)Urine produced in the kidneys moves to the urinary bladder through the ureters, each of which is about 25-30 cm long

Cardiovascular System

Heart- Functions as a pump for the movement of blood.

Arteries- Carry oxygenated blood away from the heart to the tissues.

Arterioles-A small branch of an artery leading into capillaries and allows blood to enter them.

Capillaries- Fine branching blood vessels that form a network between arterioles and venules.

Ventricle- Pumps oxygenated blood to the tissues of the body.

Blood- Supplies essential nutrients to cells.

Cardiovascular System Continued

Aorta- Distributes blood to all parts of the body through systemic circulation.

Superior Vena Cava- Returns the deoxygenated blood from the systemic circulation.

Vein- They are responsible for returning deoxygenated blood back to the heart after arteries carry blood out. 

Venules- allow blood to return from the capillary beds to drain into the larger blood vessels

Atrium- Blood enters the heart through the two atria and exits through the two ventricles

Arterioles Capillaries

Ventricle Blood

Heart Arteries

Aorta

Superior Vena Cava

Vein

Venules

Atrium

Cardiovascular System Fun Facts

When you’re 80 years old your heart will have beat 3,363,840,000 times

 The left side of the heart and the right side have different jobs

Laughter is good for your heart

Function of the Cardiovascular System

The function of The Cardiovascular system allows blood to circulate through a network of vessels throughout the body to provide individual cells with oxygen and nutrients and helps dispose of metabolic wastes. The heart pumps the blood around the blood vessels.

Digestive System

The function of the Digestive system is to turn the food you eat into energy for your body.

Tongue- To swallow and chew food, also for talking.

Colon (Large intestine)- To absorb fluids, take the waste from the body and take it out.

Pharynx- The walls that make a pathway for the food that you swallow, travels from your mouth to your esophagus.

Esophagus- Takes the food that you swallow and move it to your stomach

Salivary Glands- Produces saliva for parts of the digestive system

Gall Bladder- To store bile

Small Intestine- Digestion and the absorption of the food we eat.

Pancreas- produces digestive juices and enzymes in the body.

Digestive System Organs Continued

Stomach- Produces acids and enzymes to digest foods

Liver- Regulates blood, sugars, proteins, and fats that goes into the bloodstream.

Teeth- To tear and chew the foods you eat.

Digestive System Pictures

Colon (Large Intestine)

Tongue

Esophagus

Digestive System Pictures continued

Pancreas

Liver

Small Intestine

Stomach

Digestive System Fun Facts

The whole length of your whole digestive system is 30 ft.

it takes 2-5 seconds for your food to go from your throat to your stomach

We secrete about 1 liter of saliva each day

Endocrine System Function

Produces hormones and chemical substances that regulate the cells and organs of the body. They regulate things such as growth and metabolism.

Adrenal Glands- Produce hormones that help control blood sugar and burn protein and fat it also has reactor sensors that detect illness and injury.

Hypothalamus-Link the nervous system to the endocrine system using the pituitary gland.

Pancreas- Converts food we eat into "fuel" for the body.

Endocrine system parts cont.

Pineal Gland- regulates reproductive hormones and helps control the circadian rhythm.

Pituitary Gland- Produces hormones critical to the body.

Thymus- "trains" and develops the T-cells in our body.

Thyroid Gland-Plays a major role in maturing metabolism and growth.

Adrenal Glands

hypothalamus

pancreas

Pineal Gland

Pituitary gland

Thymus

Thyroid Gland

Endocrine System Fun facts

The Hypothalamus makes you feel hungry and thirsty.

There are 30 hormones in the human body

Glands are small organs located throughout your body.

Immune System Function: The function of the immune system is to work together to protect the body

Appendix: Technically unknown.

Lymph Node: defend the body against microorganisms and against harmful foreign particles.

Spleen: Filters blood

Skin: protection, regulation and sensation

Thymus: training and development of T-lymphocytes or T cells

Tonsil:protecting the body against respiratory and gastrointestinal infections

Immune System Pictures

Appendix

Lymph Node

Spleen

Tonsil

Immune System Fun Facts:

1. Stress can affect the way your immune system works.
2. Vaccines play an important role in educating your immune system.
3. Your immune system can attack itself.