Health Science Body Systems

Skeletal, Nervous, and Cardiovascular

Kate Dicken

Johnson 2

HST


Pictures of the Systems

Skeletal Body System

a. Each bone is an organ

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

a. Composed of the brain, spinal cord, nerves, and special sense organs; one of the most complex, yet smallest systems of the body

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

a. Composed of:

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

Health Science Technology - Team 1B

Kate Dicken

Sarah Peterson

Ryan Wallce

Lilly Balsamo