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BIO DEATH #1 > CIRCULATORY > Flashcards

Flashcards in CIRCULATORY Deck (26)
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1

Gastrovascular cavities

ensure diffusional distances are short

2

circulatory system needs

circulatory fluid
vessels it can flow through
pump to provide pressure to move fluid

3

3 vessels in a closed circulatory system

arteries
veins
capillaries

4

arteries

carry blood away from heart

5

veins

carry blood to the heart

6

cappilaries

very small vessels where chemical/gases are exchanged within organs

7

stenosis

when valve fails to open fully due to calcium deposits or scaring
less blood is able to pass through the valve

8

regurgitation

when a valve fails to close tightly, blood leaks back the wrong way.
heart must work harder

9

diastole

period when specific chambers of the heart relax after a contraction

10

systole

period of active contraction

11

sinoatrial (SA) node

has faster rhythm (~70bpm) set heart rhythm

12

atrioventricular (AV) node

has slower rhythm (~45bpm)

13

ECG

electrocardiogram
P wave
QRS complex
T wave

14

P wave

depolarization of atria
atria contracting

15

QRS complex

depolarization of ventricles

16

T wave

repolarization of ventricles

17

bood pressure

heart rate x stroke volume
total peripheral resistance

18

smooth muscle

helps to regulate artery diameter

19

skeletal muscle pump

contraction of skeletal muscle forces blood back toward the heart
aided by one way valves

20

respiratory pump

when we inhale, pressure changes in thoracic cavity favor blood flow to heart

21

materials cross the capillaries through

diffusion
coupled endocytosis/exocytosis
diffusion through intercellular junctions
specific transport proteins

22

Kwashiorkor

if blood pressure is greater than osmotic pressure across the entire capillary bed, all fluid flow goes from blood to tissues

23

atherosclerosis

hardening of the arteries
interferes with circulation
may lead to a blood clot or rupture

24

hypertension

high blood pressure
prolonged hypertension promotes atherosclerosis

25

pulmonary veins

blood flows to the left atrium

26

metarteriole

thorough fare channel