Cardiovascular System PPT 1

Cardio system has

Blood, heart, blood vessel

Bloods function?

transportation, regulation, protection

Blood is composed of?

Watery plasma (water, proteins, other solutes), formed elements (cells and cell fragments)

Blood is made in blank bone marrow of blank bone

Red, spongy

Two types of blood cells?

Red and white

Red blood cells?

No nucleus, contains hemoglobin, lives for 120 days

white blood cells?

Nucleus, protect the body from pathogens that get passed skin barrier, live only 1-3 days

Where is the heart located? Describe structure

mediastinum (btw sternum and vertebral column), 2/3 heart is to the left

Like a cone lying on its side with apex pointing anteriorly, inferiorly & to left.

Base points posteriorly, superiorly, & to the right

What is the heart surrounded by? What's the fxn?

pericardium, Prevents overstretching of heart, protects, anchors & reduces friction while heart contracts

What are the hearts 3 layers?

Epicardium—outermost thin, slippery layer (continuous with inner pericardial layer)

● Myocardium—muscular layer which is responsible for the pumping

● Endocardium—thin inner larger which gives smooth lining to the heart chambers

What are 4 chambers to the heart?

right atrium, right ventricle, left atrium, left ventricle