Circulation Flashcards
1
Q
Artery
A
- Carries blood AWAY from the heart under HIGH pressure
- THICK elastic walls
- Can contract and expand as needed
- Carry oxygenated blood except for the pulmonary artery
- Have a pulse
- NO VALVES
2
Q
Vein
A
- Carries BACK to teh heart under LOW pressure
- THIN walled
- VALVES to prevent backflow
- Located within skeletal muscle, which propels blood upsward and back to heart
- NO pulse
- Carry deoxygenated blood except for pulmonary vein
3
Q
Capillary
A
- Diffusion of nutrients and wastes between cells and blood
- Thin-walled
- So small that blood cells travel single file
- Blood travels slowly
4
Q
Plasma
A
- Liquid portion of blood
- Contains clotting factors, hormones, antibodies, dissolved gases, nutrients, wastes
- 90%water
5
Q
Thrombus
A
Clot
6
Q
Serum
A
Plama without clotting factors
7
Q
Calcium
A
Necessary for normal blood clotting
8
Q
Damaged tissue and platelets release:
A
Thromoboplastin + Calcium
Stimulates
Prothrombin(inactive) —-> Thrombin(Active)
Stimulates
Fibrinogen(Inactive)—-> Fibrin/Clot (Active)
9
Q
Erythrocytes
A
- Red blood cells
- Carry hemoglobin and oxygen
- Don’t have a nucleus
- Live 120 days
- Formed in bone marrow
- Recycled in the liver
10
Q
Leukocytes
A
- White blood cells
- Fight infection
- FOrmed in the bone marrow
- Die fighting infection
- A component of pus
11
Q
Thrombocytes
A
- Platelets
- Clot blood
- Cell fragments that are formed in the bone barrow from megakaryocytes
12
Q
Sinoatrial Node (SA)
A
- Sets the timing of heart contractions
- influenced by the nervous system, hormones, body temp
13
Q
Electrocardiogram
A
Can detect electrical impulses that travel through teh cardia and body tissues to the skin
14
Q
What is the average blood pressure for adults?
A
120/80
15
Q
Systolic number
A
Top number; measurement of the pressure when the ventricles contract
