1. Respiratory system
1.1. Divided into 9 parts.
1.1.1. made up of your lungs, airways (trachea, bronchi and bronchioles), diaphragm, voice box, throat, nose and mouth
1.2. main function is to breathe in oxygen and breathe out carbon dioxide
1.3. helps protect you from harmful particles and germs and allows you to smell and speak
2. Endocrine system
2.1. have thyroids glands
2.1.1. produce hormones that help you to grow
2.1.2. produce adrenaline
2.1.2.1. should only be made when it is before a really big test
2.1.2.2. make your heart beat fast and you become a athelic runner if you creat a lot of it
2.1.3. have more but lazy to write
3. Nervous system
3.1. includes the brain, spinal cord, and a complex network of nerves
3.2. This system sends messages back and forth between the brain and the body
3.3. The brain is what controls all the body's functions
3.4. The brain is what controls all the body's functions
3.5. The spinal cord runs from the brain down through the back
3.5.1. It contains threadlike nerves that branch out to every organ and body part
3.6. It is divided into 2 parts
3.6.1. The central nervous system includes the brain and spinal cord.
3.6.2. The peripheral nervous system includes the nerves that run throughout the whole body.
4. Digestive System
4.1. responable for digesting and absorbing the food
4.2. begin with your mouth
4.2.1. have sliva
4.2.1.1. have enzymes that break down food
4.3. have a stomach
4.3.1. have acid
4.3.1.1. furthur the process of breaking down food
4.4. have small intestine
4.4.1. absord nutriens
4.5. large intertine
4.5.1. absorb water
4.5.2. produce poop
4.6. have more organs but those are the major ones and I am also too lazy to mention it
5. Reproductive system
5.1. The reproductive system of an organism, also known as the genital system
5.2. is the biological system made up of all the anatomical organs involved in sexual reproduction
5.3. Many non-living substances
5.3.1. such as fluids, hormones, and pheromones
5.3.2. important accessories to the reproductive system
5.4. known as the genital system
5.5. the sexes of differentiated species often have significant differences
6. Muscular System
6.1. is composed of specialized cells called muscle fibers
6.2. Their predominant function is contractibility
6.3. It have muscles
6.3.1. attached to bones or internal organs and blood vessels
6.3.2. are responsible for movement
6.4. the integrated action of joints, bones, and skeletal muscles produces obvious movements
6.4.1. Skeletal muscles also produce more subtle movements
6.4.2. result in various facial expressions, eye movements, and respiration
7. Lymphatic System
7.1. is a network of delicate tubes throughout the body
7.2. drains fluid (called lymph)
7.2.1. that has leaked from the blood vessels into the tissues
7.3. managing the fluid levels in the body
7.4. is important for the optimal functioning of our general and specific immune responses
7.5. produce cells and antibodies
7.5.1. protect our body from infection and disease
7.6. plays an important role in the absorption of fats
8. Cardiovascular System
8.1. Have blood
8.1.1. carry o2
8.1.2. remove co2
8.1.3. transport nutrients
8.1.4. can appear differents color due to the amount of o2 that is in it
8.2. Have heart
8.2.1. is a blood pumping machine
8.2.2. have Pulmonary arteries
8.2.2.1. carry blood away the hart
8.2.3. have Pulmonary veins
8.2.3.1. carry blood to the hart
8.2.4. have Pulmonary capillaries
8.2.4.1. are tiny blood vessels through out your body
9. Excretory system
9.1. have kidneys
9.1.1. excrete waste from blood
9.2. let the waste see the world like poop and pee
9.3. if you don't have kidneys or your kidneys is broken
9.3.1. you will have to go on a machinne called the "Dialysis machine"