Roll Assignment 12/141. What is blood?

2. Why do we need blood?

3. What is the main job of your blood?

What organsorgans, or parts, make up your circulatory system? • Arteries• Veins• Heart• Blood

What is the jobjob of your circulatory system? • To transport

oxygen and nutrients around your body and to help to get rid of wastes

CirculationCirculationThere are 3 kinds of circulation in

your body:

PULMONARY PULMONARY CirculationCirculation: : the flow of blood through heart,

lungs, and back to the heart again.

CirculationCirculationThere are 3 kinds of circulation in

your body:

SYSTEMIC Circulation: SYSTEMIC Circulation: Moves oxygen-rich blood to organs and body tissues and back to the heart again.

CirculationCirculationThere are 3 kinds of circulation in

your body:

CORONARY CORONARY Circulation: Circulation: Describes flow of blood to heart tissues.

Types Of Blood VesselsTypes Of Blood Vessels

ArteriesArteries

Move blood away from heartHave thick & elastic walls, made of smooth muscles.Are connected to ventricles in the heart.

Types Of Blood VesselsTypes Of Blood Vessels

VeinsVeins

Move blood toward the heartHave one-way valves..Are squeezed by skeletal muscles.Carry blood with waste materials and that is oxygen-poor.

Types Of Blood VesselsTypes Of Blood Vessels

CapillariesCapillaries

Are microscopic blood vessels.Connect arteries to veins.Their walls are only one cell thick!Nutrients and oxygen flow to body cells through capillary walls.

Blood Vessels Clip

Circulatory System by Brainpop

1. What parts belong to your cardiovascular system?

2. What does blood do when it gets to the lungs?

3. What does blood do when it gets to your various body cells?

What is Blood What is Blood Pressure?Pressure?Blood pressure is the amount of

pressure your blood is exerting on your blood vessels.

It is highest in the arteries, lower in the capillaries, and even less in the veins.

What is Blood Pressure?What is Blood Pressure?

A wave of blood pressure is your pulse.

Measure your resting pulseMeasure your pulse after exercise

A normal resting pulse is 65-80 beats per minute.

What is Blood Pressure?What is Blood Pressure?Blood pressure is always expressed in

terms of two numbers, for example 112/60.

The first number is a measure of the pressure when ventricles contract. (pushing blood out of the heart)

The second numbers is a measure of the pressure when ventricles fill up.

Blood Pressure Clip

1. Where can you feel your pulse on your body?

2. What do we call it when blood pressure is HIGHEST?

3. What do we call it when blood pressure is LOWEST?

4. What do we call it when you have high blood pressure all the time?

Humans have 44 chambers

2 AtriaAtria and 2 VentriclesVentricles

Atria Atria

Ventricle Ventricle

The atriaatria contract together and the ventriclesventricles contract together.

The left and right sides of the heart are divided by a muscular wall called the septumseptum.

Label the parts of the heart on the diagram! Trace the path of blood through the heart with

arrows!

Right Atrium

Left Atrium

Left Ventricle

Right Ventricle Septum

Pulmonary Vein

Pulmonary Artery

Aorta

IVC

SVC

Which two chambers always hold oxygen-richoxygen-rich blood?

Left atrium & left ventricleLeft atrium & left ventricle

Which two chambers always hold oxygen-pooroxygen-poor blood?

Right atrium & right ventricleRight atrium & right ventricle

Other Heart Parts to Other Heart Parts to Know:Know:

AortaAorta: delivers oxygen-rich blood from left ventricle to the rest of the body

Other Heart Parts to Other Heart Parts to Know:Know:

Pulmonary arteryPulmonary artery: delivers blood from right ventricle to lungs

Other Heart Parts to Other Heart Parts to Know:Know:

Pulmonary Pulmonary veinvein:

delivers blood from lung into left atrialeft atria

Superior vena cava and Inferior vena cava:

Veins (vena) that come from the body and deliver blood to the right atriaright atria

Vena C

avas

Heart Clip

Artificial HeartsArtificial Hearts