Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart. 2008-2009.

Slides:



Advertisements
Similar presentations
Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart
Advertisements

BLOOD VESSELS (ARTERIES, VEINS AND CAPILLARIES). The Circulatory System is known as a CLOSED SYSTEM because the blood is contained within either the heart.
Lung All other parts of the body The mammalian circulation plan Double circulation in mammals Heart Blood Blood vessels Circulatory system pulmonary circulation.
The Circulatory System. Transport and Distribution: Regardless of your activities, whether you are sleeping, exercising, reading or watching TV, your.
The Circulatory System. What is the circulatory system? The system of the body responsible for internal transport. Composed of the heart, blood vessels,
Circulatory System of a Mammal
Common Requirements of living things - ANIMALS – Chapter 5 Pt B.
UNIT 9- Circulatory, Respiratory and Endocrine Systems.
The Circulatory System
Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart.
AP Biology  BR: Explain the connection between the cardiovascular system and…  Respiratory System  Digestive System  Excretory System  Objectives.
AP Biology Circulatory Systems AP Biology Overcoming limitations of diffusion O2O2 CHO aa CH CO 2 NH 3 aa O2O2 CH aa CO 2 NH 3 O2O2 aa CH aa.
Chapter 42 ~ Circulation and Gas Exchange Exchange of materials Animal cells exchange material across their cell membrane –fuels for energy –nutrients.
Cardiovascular Physiology Vascular System Components of Circulatory System Cardiovascular System (CVS): Heart Blood vessels Lymphatic System:
Circulatory System in Animals
Cardiovascular System Chapter 17&18. Blood Connective tissue composed of fluid, cells, and fragments of cells 1.Plasma: fluid part of blood straw-colored.
Circulatory Systems  Animal cells exchange material across their cell membrane  fuels for energy  nutrients  oxygen  waste (urea, CO.
Ch 38 Circulatory System AP Lecture 4 chamber heart is double pump = separates oxygen-rich & oxygen- poor blood; maintains high pressure What’s the adaptive.
Why do we need a circulatory system?
Regents Biology Circulatory System Transport.
Circulatory System Consists of… Blood Vessels Blood Heart.
Day 2 Mammalian Circulation
The Transport System IB topic 6.2. The transport system  Mammals have a closed circulation Blood is pumped by the heart and circulated in a continuous.
Circulatory System A general tour Exchange of materials Animal cells exchange material across their cell membrane  Fuel for energy  Nutrients  Oxygen.
Chapter 33 Circulatory System. The Circulatory System Functions of the Circulatory System The circulatory system transports oxygen, nutrients, and other.
Do Now 11/7/14 What is the pathway that an electrical impulse follows from the brain to causing a heart beat? What are the different mechanisms that regulate.
Regents Biology Circulatory System in Animals.
Circulatory system.
Circulatory System.
Higher Human Biology Subtopic 13 Circulatory system
Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart
Homeostasis during Exercise
End to end, they would encircle Earth two and a half times!
Circulation and Gas Exchange
Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart
Circulatory Systems
Mammalian Circulation
Blood Vessels Compare the structure and function of blood vessels. (GLOs: D1, E1) Examples: diameter, elasticity, muscle layers, valves, what they transport.
Blood Vessels and their Functions
Circulatory System of a Mammal
The Blood Vessels UNIT B
The Blood Vessels UNIT B
The Circulatory System
Circulatory System Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart
TRANSPORT SYSTEMS IN HUMANS
Circulatory Systems.
Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart
Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart
Lymphatic System.
Lymphatic System.
Cardiovascular and Circulatory System
Circulatory System Main Functions:
Aim: Blood Vessels Aim: Blood Vessels Enter Date Warm-up: HW:
The human respiratory system
Cardiovascular System
Cardiovascular System What do you know already?
Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart
The Transport System IB topic 6.2.
Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart.
The Circulatory System
Circulatory System.
Circulatory System.
Unit J. Circulation and Blood .
Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart.
Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart
Transport in Living Organisms
Circulatory System Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart
Presentation transcript:

Circulatory Systems Take a look at a skeleton and see how well a heart is protected — open heart surgery takes breaking a body to get to the heart. 2008-2009

Exchange of materials Animal cells exchange material across their cell membrane fuels for energy nutrients oxygen waste (urea, CO2) If you are a 1-cell organism that’s easy! diffusion If you are many-celled that’s harder

In circulation… What needs to be transported nutrients & fuels from digestive system respiratory gases O2 & CO2 from & to gas exchange systems: lungs intracellular waste waste products from cells water, salts, nitrogenous wastes (urea) protective agents immune defenses white blood cells & antibodies blood clotting agents regulatory molecules hormones

Vertebrate cardiovascular system Chambered heart atrium = receive blood ventricle = pump blood out Blood vessels arteries = carry blood away from heart arterioles veins = return blood to heart venules capillaries = thin wall, exchange / diffusion capillary beds = networks of capillaries Arteries, veins, and capillaries are the three main kinds of blood vessels, which in the human body have a total length of about 100,000 km. Notice that arteries and veins are distinguished by the direction in which they carry blood, not by the characteristics of the blood they contain. All arteries carry blood from the heart toward capillaries, and veins return blood to the heart from capillaries. A significant exception is the hepatic portal vein that carries blood from capillary beds in the digestive system to capillary beds in the liver. Blood flowing from the liver passes into the hepatic vein, which conducts blood to the heart.

Blood vessels arteries arterioles capillaries venules veins veins artery arterioles venules arterioles capillaries venules veins

Arteries: Built for high pressure pump thicker walls provide strength for high pressure pumping of blood narrower diameter elasticity elastic recoil helps maintain blood pressure even when heart relaxes

Veins: Built for low pressure flow Blood flows toward heart Veins thinner-walled wider diameter blood travels back to heart at low velocity & pressure lower pressure distant from heart blood must flow by skeletal muscle contractions when we move squeeze blood through veins valves in larger veins one-way valves allow blood to flow only toward heart Open valve Closed valve

Capillaries: Built for exchange very thin walls lack 2 outer wall layers only endothelium enhances exchange across capillary diffusion exchange between blood & cells

Controlling blood flow to tissues Blood flow in capillaries controlled by pre-capillary sphincters supply varies as blood is needed after a meal, blood supply to digestive tract increases during strenuous exercise, blood is diverted from digestive tract to skeletal muscles capillaries in brain, heart, kidneys & liver usually filled to capacity Why? sphincters open sphincters closed

Exchange across capillary walls Lymphatic capillary Fluid & solutes flows out of capillaries to tissues due to blood pressure “bulk flow” Interstitial fluid flows back into capillaries due to osmosis plasma proteins  osmotic pressure in capillary BP > OP BP < OP Interstitial fluid What about edema? About 85% of the fluid that leaves the blood at the arterial end of a capillary bed reenters from the interstitial fluid at the venous end, and the remaining 15% is eventually returned to the blood by the vessels of the lymphatic system. Blood flow 85% fluid returns to capillaries Capillary 15% fluid returns via lymph Arteriole Venule

Lymphatic system Parallel circulatory system transports white blood cells defending against infection collects interstitial fluid & returns to blood maintains volume & protein concentration of blood drains into circulatory system near junction of vena cava & right atrium

Lymph system Production & transport of WBCs Traps foreign invaders lymph vessels (intertwined amongst blood vessels) lymph node