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Description
Flashcards by Abigail Shammas, updated more than 1 year ago
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Created by Abigail Shammas
over 4 years ago
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| Question | Answer |
| What is another name for the circulatory system? | Cardiovascular System |
| What are the four jobs of the circulatory system? | -Delivers needed substances to cells -Carries wastes away from the cells - Helps regulate body temperature - Some cells in the blood also help to fight disease |
| What makes up the circulatory system? | Made up of the heart, blood vessels, and blood. |
| How does the circulatory system deliver materials? | Blood transports Chemical messengers (like hormones), oxygen from your lungs, and glucose from you digestive system to your body cells. |
| Explain the process of how the circulatory system Removes Wastes | - Blood takes waste from your body's cells - Blood transports carbon dioxide from you body to your lungs -Exhaled |
| Explain the process of how the circulatory system Regulate Body temperature | - Change the amount of blood flow near the skin -Help carry heat and prevent heat loss |
| Explain the process of how the circulatory system Fights Disease | Blood contains cells that attack diseases causing microorganism like bacteria |
| What is the heart? | Heart = Hollow, muscular organ that pumps blood through the body through blood vessels |
| What are atria? | Upper chambers (2) of the heart that receives blood |
| What are ventricles? | Lower Chambers (2) of the heart that pump out of the heart |
| What is the pacemaker? | Pacemaker= -a group of cells in the right atrium that sends out signals that regulate heart rate - Signals make the heart contract |
| What is a valve and what does it do? | A valve = a flap of tissue that prevents blood from flowing backward - They also separate the ventricles and the large blood vessels that carry blood away from the heart - Valves separate the atria from ventricles |
| What does a heartbeat sound like? Why? | -The heartbeat sounds like a "lup-dup" - It comes from the different valves contracting |
| Describe and be able to sketch the blood flow in the body. | Right Atrium - Right Ventricle - Arteries - Capilaries- Veins - Left Atrium - Left Ventricle |
| What are the three kinds of blood vessels? | 1. Arteries 2. Veins 3. Cappilaries |
| Where are blood vessels found? | Blood vessels run through all the tissue in your body |
| Describe the width of your blood vessels. | Some blood vessels are as wide as your thumb, but most are as thin as human hair. |
| Where do arteries carry blood. | Carry blood away from the heart |
| Describe the three tissue layers of the walls of arteries. | Innermost layer: Allows blood to flow freely Middle layer: regulates the amount of blood sent to different organs Outermost layer: Enables arteries to withstand the force of pumping blood |
| Where does blood go after leaving the arteries? | The capilarries |
| Why do capillary walls only have one layer of cells? | This allows materials from the bloodstream to pass through the walls and to the body easily |
| What happens when capillaries merge? | When capillaries merge they form blood vessels called veins |
| Why does blood enter the veins? | Blood enters the veins to go to the arteries |
| Compare and contrast the walls of the veins to the walls of the arteries | the walls have the same layers as the arteries but are THINNER than the walls of the arteries |
| What are the four components: | Plasma, red blood cells, white blood cells, platelets |
| What % of blood is made of cells | About 45% of blood is made up of cells |
| Describe Plasma and its functions | Most materials travel in the plasma Plasma can carry nutrients, fats, vitamins, minerals, chemical messengers, carbon dioxide, and other waste products |
| What is the job of the RBCs? | - Take up oxygen from the lungs and deliver it to the cells throughout the body |
| What is the hemoglobin | A protein that contains iron and binds to oxygen molecules in the lungs |
| What are white blood cells? | White blood cells are the body's disease fighters |
| What are the three main jobs a WBC might have? | Recognize disease-causing organisms and alert the invasion - Produce chemicals to fight the invader - Surround and kill the disease-causing organism |
| Compare the size of WBC and RBC | WBC are bigger than RBC |
| What are Platelets? | Platelets are cell fragments that help form blood clots |
| What is the function of fibrin? | -platelets \ release the protein, fibrin. -Fibrin weaves a tiny net of fibers across the cut to help heal the cut. |
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