Walk-In Take out notebook, folder, pencil box and a pencil. Put backpack away. Log in and wait for directions.

Today’s activities View the presentation on the class webpage, www.Kyrene.org/sryan Take notes on your slide guide. Write a paragraph in your notebook at the end of the presentation. Take an online quiz, using your slide guide. If done, go to Educational Resources, log in to Kyrene Discovery Education, and view video clips about the digestive, respiratory, circulatory and muscular/skeletal systems.

Circulatory System: Heart, Blood, Blood Vessels Transports Materials from the digestive and respiratory Systems to the cells.

Structures in the Circulatory System Heart – pushes blood throughout the body. Two pumps – one on right side, one on left side. Left side – pumps oxygen-rich blood to entire body Right side - pumps oxygen-poor (used) blood to the lungs to receive oxygen. Has valves to open and close.

Why is blood red? Chambers - each side of heart divided into 2 parts – right and left atrium and ventricle. All blood is red, but oxygen rich blood is a much brighter and lighter shade of red. (charts usually show oxygen-poor blood in blue) Blood carries oxygen and nutrients to all cells in the body.

Blood –delivers nutrients, O2, removes wastes and CO2 , is made up of plasma, red blood cells, white blood cells and platelets.

Plasma 60% of blood is plasma (and plasma is mostly water!) – A fluid that contains proteins, glucose, hormones, gases and other substances dissolved in water.

White Blood Cells White Blood cells – help body fight infection by surrounding bacteria and digesting them with chemical enzymes.

Red Blood Cells Red blood cells – more numerous, hemoglobin picks up O2 in lungs and transports it throughout body, and RBCs carry CO2 back to lungs.

Platelets – large, solid cell fragments, help form blood clots. Clotting keeps us from losing too much blood from a cut. platelets

Different Blood Types Each red blood cell has special proteins on its surface. The group of surface proteins determines blood type. There are 2 blood-type proteins – A & B. A person with A proteins in blood – Type A A person with B proteins in blood – Type B Some people have both proteins – Type AB Some people have neither proteins – Type O 4 Types of Blood – A, B, AB, O

Blood Pressure Blood Presssure - The pressure exerted by blood on the veins and arteries. Must maintain healthy blood pressure to get blood to all parts of body. Too low – some cells will not get oxygen and other materials. Too high – force will weaken the vessels and require the heart to work harder to push the blood through.

(Read only)Blood Vessels Blood vessels – tube-shaped structures that move blood all over the body.

Veins Veins – carry oxygen-poor blood back to the heart and lungs have a one-way valve.

Arteries Arteries – carry oxygen-rich blood away from lungs and heart to the rest of the body

Capillaries Capillaries – narrow, smallest blood vessels, they connect arteries with veins, and change oxygen-rich blood to oxygen poor blood.

THINK OUT an answer to this question… Why do the heart and lungs have to work together to help keep you alive? Now check it on the next slide…

Answer The lungs breathe in oxygen and the alveoli add it to the blood at the capillaries. The heart pumps the O2-rich blood to all body parts to deliver oxygen. The blood gets carbon dioxide from the body parts. The heart pumps it back to the lungs, to breathe out CO2 and breathe in O2. NOW WRITE THIS OUT IN YOUR NOTEBOOK, IN YOUR OWN WORDS!

Take the online quiz! Go back to the class webpage and click the link to take the quiz. When done, go to Discovery Education.

If you are done… Go to www.Kyrene.org, choose Students, then Educational Resources Log in to Discovery Education. Search for video clips about the Digestive Respiratory Circulatory Muscular Skeletal system