Bell Work: 12/5/13

• Using the Human Body Quest Bell Work packet, complete the questions for cardiovascular and respiratory systems.

• Use the page numbers provided.

You are being timed! You only get 10 minutes to complete

bell work!

Word Wall Words

• Pathogens

• Diaphragm

• Respiration

Objectives

• Can I explain the basic functions of a major organ system. (SPI0707.1.3)

39. Cardiovascular and Respiratory Systems (one page)

Cardiovascular/Circulatory (pg. 232-237)

• Your heart, blood, and blood vessels make up your cardiovascular system.

• Your heart creates pressure when it beats, moving blood throughout the body.

• The cardiovascular system helps maintain homeostasis (stable internal environment) by:

– Carrying blood and nutrients to your cells and removing wastes from your cells.

– Carrying chemical signals called hormones throughout the body.

Cardiovascular/Circulatory (pg. 232-237)

• The heart is an organ made mostly of cardiac muscle tissue.

• The heart is about the size of your fist and is almost in the center of your chest cavity.

The heart pumps blood through blood vessels. The vessels carrying oxygen-rich blood are shown in red. The vessels carrying oxygen-poor blood are shown in blue.

Cardiovascular/Circulatory (pg. 232-237)• Blood is a connective tissue made up of plasma, red blood cells,

platelets, and white blood cells.• Blood travels throughout your body carrying oxygen and

nutrients in hollow tubes called blood vessels.

• Three types of blood vessels:1. Arteries- carries blood away from the heart2. Capillaries- allows exchanges between body cells and blood3. Veins- carries blood back to the heart

• BrainPop Cardiovascular

Respiratory System (pg. 246-249)• Respiration is the process by which a

body gets and uses oxygen and releases carbon dioxide and water.

• The respiratory system is a group of organs that take in oxygen and get rid of carbon dioxide.

• Respiratory System Organs:– Nose, throat, lungs, and passageways that

lead to the lungs

Respiratory System (pg. 246-249)• Breathing is done by the diaphragm

(muscle) and rib muscles since the lungs have no muscles of their own.

• Breathing Steps:1. Inhale and the diaphragm contracts, moves

down, and the chest cavity’s volume increases.

2. At the same time, rib muscles contract and lift the rib cage.

3. The chest cavity gets bigger and a vacuum is created.

4. Air is sucked in.

• BrainPop Respiratory

Drawings

• For each body system, draw and color at least one organ that belongs in that body system.

• For example:– Cardiovascular System = heart, arteries, and

veins– Respiratory System = nose, bronchus,

pharynx, larynx, trachea, lungs, diaphragm

• Use your textbook pictures or the sample sheet in the folder at your group.

Human Body Books

Interesting FactsCardiovascular System:• The heart beats around 3 billion times in

the average person's life.• Heart diseases are the leading cause of

death in the U.S.• A heart attack happens when heart

muscle cells die and part of the heart muscle is damaged. Arteries that deliver oxygen to the heart may be blocked and without oxygen, heart muscle cells die quickly. When enough muscle cells die, the heart may stop.

• Heart failure happens when the heart cannot pump enough blood to meet the body’s needs.

• In humans and other hemoglobin-using creatures, oxygenated blood is bright red. This is due to oxygenated iron in the red blood cells. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken. However, due to an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that venous blood is blue before it is exposed to air.

Respiratory System:• The right lung is slightly larger

than the left.• When people who live at low

elevations travel up into mountains, they may find themselves breathing heavily.

• Hairs in the nose help to clean the air we breathe as well as warming it.

• The highest recorded "sneeze speed" is 103 miles per hour.

• The surface area of the lungs is roughly the same size as a tennis court.

• Bruises- capillaries are damaged by trauma allowing blood to seep into the surrounding tissues.