1. Ch. 47 – Circulatory System
Draw the heart
SA node  top (pacemaker)
AV node  bottom pg. 995
Blood Pressure
Systole  top reading
Diastole  bottom reading
120/80 pg.996

2. Heart pg.994 Located under the sternum; about the size of a fist.
Averages 72 beats/min
Pumps 5.5 L of blood per minute.
Protect with a sac-like membrane around it called the pericardium.
Divided into right & left sides by a septum.

3. Causes of heart rate increase
1. Carbon dioxide
2. Increase in temperature
3. Hormones
4. Brain reflex (scared)

4. Blood Vessels Artery, vein, capillaries pg. 991 Muscles in the vessels
1. Connective
2. Smooth
3. Endothelium
Why is the artery thicker than the vein?

5. What is the largest blood vessel?
Aorta, Why?
Arteriesarteriolescapillariesvenulesveins
Vercose veins – close to the skin’s surface
Can cut or strip these out.

6. Pulmonary Artery – only artery to carry Deoxygenated blood.
Pulmonary Vein – only vein to carry oxygenated blood.

7. 3 subsystems of circulation
1. Coronary Circulation
Heart
2. Renal Circulation
Kidney
3. Hepatic portal Circulation
liver

8. Blood Liquid tissue – 9% body weight Average person has 5 Liters.
1. Plasma – liquid portion
55% of the blood volume
Sticky, straw-colored liquid
90% water

9. 2. Red Blood Cells (erythrocytes) pg. 988
Formed in the liver, spleen, and bone marrow.
Flat disks with 2 concave surfaces. They help transport oxygen.
Hemoglobin is a protein that forms with RBCs
Molecule inside RBCs that transports oxygen.

10. There are about 30 trillion RBCs in the human body at once
There are about 30 trillion RBCs in the human body at once. They live for only about 130 days. About 2 million RBCs are regenerated every second.

11. 3. White Blood Cells
Ameboid movement
Help defend the body against diseases.
Larger than RBCs
They are phagocytes (engulf)
WBCs carry antibodies that destroy foreign substances (colds & infections)

12. 4. Platelets or throbocytes
Start blood clotting process
Live 7 to 11 days
Serum doesn’t have clotting properties.

13. Blood Types – pg. 990 Antigens  A,B,AB,O
A  antigen [A] , antibody [B]
B  antigen [B], antibody [A]
AB  antigen [A & B] , no antibody
O  no antigen, antibody [A & B]

14. Genotype A  Ia Ia & IaIo B  IbIb & IbIo AB  IaIb O  IoIo
Universal receiver AB
Universal donor O

15. Rh Factor – pg. 991
Protein found in the blood, it’s a blood antigen. Named after the Rhesus monkey.
85% U.S. population positive
15% U.S. population negative
Can’t mix or it will agglutinate.

16. Respiratory System Passage: - pg. 983
Nostrils, nasal passage, pharynx, trachea, bronchi, bronchi tubes, air sacs (alveoli)
What is the process of taking air into the lungs?
Inhale
What the process of letting air out?
Exhale

17. Your lungs holds about 6 L of oxygen  Total Lung Capacity
You normally inhale about .5 L of oxygen.
The maximum amount of air a person can inhale & exhale is 3500-ml  Vital Lung Capacity

18. The air you breathe in & out just sitting is 500-ml  Tidal Air
The air you breathe in & then in some more is 1500-ml  Complemental Air
The air you breath out & then out some more is 1500-ml  Supplemental Air

19. The air that stays in your lungs is 1000-ml  Residual Air
Respiration rate is the measurement of the # of times a person inhales & exhales in a minute.
Men  15 –16
Women & children  20

20. Exercise – pg