Circulatory system Functions Carries blood and needed substances (oxygen and nutrients) to cells and waste products away to the cells and all your body. Carries cells that fight disease Main structures: The Heart Pump blood The Blood Vessels: (veins, arteries, capillaries) Bring blood around Blood Carry oxygen, nutrients and waste CRASH COURSE REVIEW

Lymphatic System Functions Collect and Return tissue fluid to the bloodstream. Surveillance & defense Bring the lipids from the digestive system to the cells that need it Components Lymph is the fluid Vessels – lymphatics Structures & organs: Tonsils, Spleen, thymus CRASH COURSER REVIEW

Respiratory system Functions Moves oxygen from the outside environment into the body. Removes carbon dioxide and water from the body Main Structure: Lungs Also bronchi, bronchioles, alveoli, nasal cavity, pharynx, larynx, epiglottis, trachea, ONCE UPON A LIFE REVIEW

Nervous system Main Function: Control for the rest of the systems and body functions Receives information from inside and outside the body Directs the way that the body will respond Divided in 2: Central Nervous system; Peripheral nervous system Main structures brain, spinal cord, nerve cells NEURONS, sense organs CRASH COURSE REVIEW

Reproductive system Function allows more humans to be born to continue the species Main structures egg, sperm, ovaries, testes CRASH COURSE REVIEW

Endocrine system Functions produces hormones that control the levels of other substances in the body Keep the homeostasis of your body Structures glands, hormones CRASH COURSE ENDOCRINE

Immune system Main function: fights germs entering the body Main parts: lymph, white blood cells, antibodies CRASH COURSE REVIEW

Integumentary system Main organ: SKIN Functions Protects the other body systems from injury, infection Helps the body maintain homeostasis synthesis of vitamin D Required for bone formation Excretion of salts, water and wastes sensory perception Main organ: SKIN

Excretory system Function This system collects the waste produced by the cells and removes the waste from the body. Main organ: Kidneys Others are urinary bladder, urethra, ureter, liver CRASH COURSE REVIEW

Digestive system Function Breaks down food small enough to get into your cells. Main Structures stomach, esophagus, mouth, salivary glands, large and small intestine, rectum, villi, pancreas, liver, gall bladder Chemical digestion. Mechanical digestion. CRASH COURSE REVIEW

Skeletal system Functions Provide the body structure and support, protects organs, produces blood cells, stores minerals, movement Main structures: bones, joints, ligaments CRASH COURSE REVIEW

Muscular system provide movement for the body The main function skeletal: Pull bones to cause movement smooth: Organ muscle, and vascular walls cardiac: Heart contractions Main structures: 3 types of muscle And tendons CRASH COURSE REVIEW