This document provides information about the circulatory system. It contains 3 chapters that describe the components, major arteries and veins, and blood flow through the heart. The components section lists the main parts of the circulatory system including the heart, blood vessels, and lymph system. It also describes the six functions of the circulatory system which include respiration, excretion, protection, nutrition, regulation, and hormone transport. The major arteries and veins section lists some of the key blood vessels. The final section explains how blood moves through the heart chambers and lungs before being pumped back out to the body, and it provides details on the composition of blood.

1. ANIMAL ANATOMY
Animal
Systems
SAMANTHA RUSSELL

2. CHAPTER 1
Circulatory
System

3. CIRCULATORY SYSTEM
Function and Components
COMPONENTS
1. Heart 2. Pericardium
3. Artery 4. Vein
5. Capillary 6. Lymph System
7. Lymph Node 8. Spleen
blood cells and iron, destroys old red blood cells, and pro-duces
lymphocytes and monocytes.
There are six functions of the circulatory system. They are res-piratory,
excretory, protection, nutrition, regulatory, and hor-monal.
The exchange of oxy-gen
and carbon diox-ide
is the respiratory
function.
The excretory func-tion
removes the
waste from body
cells.
Clotting and the
transporting of white
blood cells to infec-tions
is protection.
Food and energy being carried throughout the body is provid-ing
nutrition.
Regulatory helps maintain pH and temperature throughout
the body.
Lastly, hormonal transfers hormones throughout the body to
organs.
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The heart is a muscular, pump with four chambers that drives
the circulatory system.
The pericardium is a fibrous sac which encloses the heart.
An artery is elastic vessel that has thick walls which helps main-tain
high pressure while blood is carried away from the heart.
Veins are thin walled vessels that carries deoxygenated blood
to the heart.
Capillaries form networks between arteries, veins, and body tis-sues.
The lymph system plays an important role in disease preven-tion
and immunity.
The lymph node is a bean shaped structure that is located all
around the body. It produces lymphocytes and monocytes, it
also filters through bacteria, foreign bodies, and malignant
cells.
The spleen is the largest of the lymph organs. It stores red

4. CIRCULATORY SYSTEM
Major Arteries and Veins
• Aorta
• Brachiocephalic
• Common carotid arteries
• Coronary arteries
• Facial artery
• Femoral artery
• Mesenteric
• Renal artery
• Pulmonary arteries
• Pulmonary veins
• Cranial vena cava
• Caudal vena cava
• Cephalic vein
• Jugular vein
• Renal vein
• Femoral vein
• Saphenous vein
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5. CIRCULATORY SYSTEM
Movement of Blood and
Structure
There is a certain order that the blood flows through and out
of the heart. The blood goes through the right atrium and
moves to the right ventricle. Form the right ventricle it flows
through the pulmonary arteries and then moves to the lungs.
Following the lungs it
flows through the pul-monary
veins and
then the left atrium.
From the left atrium
it moves to the left
ventricle. Once in the
let ventricle it moves
to the aorta.
Blood is composed of cells and plasma. Plasma is the liquid
portion of the blood. Cells make up 40% of all blood and the
other 60% is plasma.
The cellular por-tion
of blood is
made up of red
blood cells or
erythrocytes,
white blood cells
or leukocytes,
and platelets.
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