Health Science Body Systems
Skeletal, Nervous, and Cardiovascular
Kate Dicken
HST
Pictures of the Systems
Skeletal
The hard structure (bones and cartilages) that provides a frame for the body of an animal or human.
Nervous
The network of nerve cells and fibers that transmits nerve impulses between parts of the body.
Cardiov-ascular
The organs and tissues involved in circulating blood and lymph through the body.
Skeletal Body System
1) Over 200 Bones
2) Approximately 22 of the pounds of weight in a 125 person
b. The joints and cartilage complete the system
c. Functions
1) Supports the body
2) Protects the organs
3) The sites for muscle attatchment
4) The levers for movement
5) Blood cell formation
6) Mineral Storage
Nervous System
b. capable of producing electrical messages for communication within the body
1) These messages can be transported within milliseconds
c. Functions
1) Monitors internal and external environments with receptors
2) Interprets stimuli
3) Responds to stimuli by sending an electrical message to another nerve, muscle, or gland
4) Thus, regulates bodily activities
5) Special senses are taste, smell, sight, hearing, and equillibrium
Cardiovascular System
1) Heart
a. Pump
b. Blood
c. Blood vessels:
i. Arteries
(a) Flow away from heart
ii. Veins
(a) Flow toward Heart
iii. Capillaries
(a) Flow between arteries and veins
2) The heart is a 4-chambered pump
3) The left side of the heart pumps blood through the arteries to the capillaries
4) At the capillaries, the blood releases nutrients, oxygen, and other necessary molecules into the body tissues
5) Also at the capillaries, the blood receives waste products, carbon dioxide, and other cellular products
6) Deoxygenated blood returns to the heart via veins
7) The right side of the heart pumps blood to the lungs to release carbon dioxide and receive oxygen
8) In the course of 1 minute, all the blood in the body circulates through the heart
b. Functions of the cardiovascular system
1) Supplies cells with nutrients and oxygen
2) Removes waste products from cells and delivers them for removal from the body
3) Helps regulate the acide-base balance (pH)
4) Helps regulate water volume
5) Helps regulate temperature
6) Helps defend against disease
7) Mends damaged vessels