1. warm up 11 4/29
Myelin sheath axon neuron
Dendrite cell body synapse
neurotransmitter
The cells that transmit impulses in the nervous system are called 1.____________.
Impulses are received through the 2.____________.
The largest part of the neuron is the 3.___________. Impulses are then carried away from the cell body through the 4._________. This is surrounded by an insulated member called 5._______________. The location which a neuron transfers an impulse to another cell is called the 6._________. The impulses are sent through the synapse as chemicals called 7.________.

2. The Cardiovascular System (Circulatory System)

3. What parts does it consist of?
Heart
Blood vessels
Blood

4. Functions: Carries needed substances (oxygen, nutrients, waste) to cells, carries waste products away from cells, fights disease

5. Blood carries substances that need to get from one part of the body to another
Examples:
Blood carries oxygen from your lungs to your other body cells
Blood transports the glucose your cells use to produce energy

6. Blood picks up waste products from cells
Example:
When cells break down glucose, they produce carbon dioxide (waste product). The carbon dioxide passes from cells into the blood where it is taken to the lungs to be exhaled

7. Blood contains cells that fight disease.
White blood cells are the body’s disease fighter
Recognize disease-causing organisms (bacteria).
Alert body of invasion
Surround and kill the organism

8. Some WBCs called phagocytes eat up antigens (bacteria, viruses & fungi).
Pus is formed when these WBC battle antigens!

9. Pacemaker: sends out signals to contract heart
The heart has
2 sides (right/left)
4 chambers
Upper chamber: atrium (receives blood)
Lower chamber: ventricle (pumps out blood)
Valves- prevents backflow
Pacemaker: sends out signals to contract heart

10. works
Systemic circulation
Pulmonary circulation

12. What happens after occurs in the Blood vessels
Arteries- carries blood Away from the heart
Capillaries- tiny narrow vessels where substances are exchanged between blood and body cells
Veins- carries blood back to the heart

13. 1st loop- blood travels from the heart to lungs & back to heart 2nd loop- travels from the heart to the body and back to the heart

14. Blood Pressure
As blood travels through blood vessels, the blood exerts a force against the walls of the blood vessels, similar to water moving through a hose

15. Diseases of the circulatory system
Atherosclerosis- fatty deposits called plaque build up on the inner walls of the arteries
Leading cause of
death in US
1/3 deaths

17. How to recognize a stroke
Ask the individual to smile
Ask them to raise both arms
Ask them to speak a simple sentence