4.3 Circulation and Respiration

What is the Cycle of Blood Movement

Blood leaves heart in Arteries,
Arteries pass blood to Artieroles

Capillaries connect Arterioles to Venules

Venules connect to Veins to bring blood back to heart

How does the Open Circulatory System work

Heart pumps hemolymph (mix of blood and fluid) through vessels into hemocoel (open body cavity) then back into heart

What’s the main purposes of the Circulatory System

• Transports Nutrients and Gases like Co2 and o2

• Removes Waste Products through Urea

• Hormones

What are the 4 chambers of the Heart

Right Atrium, Left Atrium, Left Ventricle, Right Ventricle

What does the Right Atrium do

Recieves oxygen-poor blood and pumps it into right ventricle

What does the Right Ventricle do

Pumps oxygen-poor blood to lungs, dropping off Co2, and picks up new oxygen

What does the Left atrium do?

Recieves new oxygenated blood from lungs and pumps into left ventricle

What does the Left Ventricle do?

Pumps oxygen rich blood to rest of body, largest and most muscular chamber

What is the Pulmonary circulation

moves deoxygenated blood to lungs

What is Systematic circulation

delivers oxygenated blood, nutrients, to entire body and removed waste

In the heart system, is left and right reversed?

Yes, Right is Blue, Left is Red

What are Arteries

thick, muscular, elastic vessels that carry oxygenated blood away from heart

Veins

thinner, and less elastic vessels that transport deoxygenated blood back to heart

Which one is thicker, Arteries or Veins?

Arteries

What are Capillaries

smallest blood vessels that connect arterial and venous system

What do capillaries do

transport oxygen, nutrients and waste products between blood and tissue

What is a Lymph?

Clear, watery fluid that leaks out of blood capillaries into spaces between cells

How is lymph returned back to the bloodstream

Enters Thoradcic Duct or Right Lymphatic Duct

What are the components of blood

Plasma and Cellular Components like RBCS, WBCS, and Platelets

What is the percent of Plasma to Cellular Components in Blood?

Plasma is 55% and Blood is 45%

How do RBC’s transport oxygen

Through Hemoglobin, a protein that binds to oxygen in the lungs

Why is Oxygen released from Red Blood Cells

Hemoglobin inside RBC reacts to chemical environment of active tissues

How is CO2 transported in the blood?

From body’s tissue to lungs through Bicarbonate Ions, Bounding to Hemoglobin, and being dissolved in Plasma

What are all the parts of the heart?

Superior Vena Cava, Pulmonary vein, right atrium, pulmonary valve, tricuspid valve, inferior vena cava, right ventrocle, pulmonary artery, aorta, left atrium, mitral valve, aortic valve, left ventricle

label all parts of the heart

ok

at 90 mV, what is the heart doing

stable

at 50 mV, what is the heart doing

plateauing to contract muscle cell

at 70 mV, what is the heart doing

rapid depolarization

after contraction of muscle cell, what does the heart do

repolarization back down to 90 mV

draw out the depolarization and repolarization on a graph, including mV

ok

what does the EKG mean and do?

ElectroCardio Gram and reads electrical signal that controls heart beats