1 3 intro to the circulatory systemPresentation Transcript
DO NOW Describe how the excretory system works with the digestive system to help your body maintain homeostasis.
Objective:What are thefunctions andthe organs ofthe circulatorysystem?
FUNCTIONS OF THE CIRCULATORY SYSTEM1. Transportation of needed molecules Oxygen Nutrients Other substances1. Removes waste from cells Carbon dioxide Other metabolic wastes Predict why we need a specialized system that helps cells transport nutrients and wastes. Millions of cells are not in in contact with external environment
FUNCTIONS OF THE CIRCULATORY SYSTEM Millions of cells are not inin contact with externalenvironment Circulatory system bringsthese cells molecules s takenfrom external environmentLife Functions: Circulation;Transportation; Absorption
REGENTS REVIEW Which two activities in the chart best describe the process of transport?1. A and C2. B and C3. C and D4. A and D
REGENTS REVIEW Describe how the circulatory and digestive systems work together to maintain homeostasis.
IMAGINE… Think about driving to your house from New Jersey..
YOU CAN’T DRIVE WHEREVER YOU WANT! The circulatory system is the “roads” of our body: • A network of transportation to bring us the things we need • A network to take away the things we don’t need
WHAT ARE THE ORGANS THAT MAKE UP THE CIRCULATORY SYSTEM? The circulatory system is made of: Heart Blood Vessels (ex: arteries, veins, capillaries) Blood (blood is considered a tissue – why?)
THE HEART Structure: Size of a clenched fist Made of almost all muscle 4 CHAMBERS of the heart Upper 2 chambers receive blood from the body – ATRIA Lower 2 chambers pump blood to body – VENTRICLES
THE HEART Septum - Wall separates two sides of the heart Right side has blood without oxygen in it Left side has blood with oxygen in it Don’t want to mix blood Predict where blood without oxygen would be pumped to. Blood with oxygen?
THE HEART Function: Transports blood that contains nutrients around the body; think of it as the motor of your body Starts pumping (or contracting) before you are born Stops when you die Contracts on average 72 times a minute
REGENTS REVIEW In the diagram of the human heart, which structures are most closely associated with the transport of deoxygenated blood?1. A, B, and C2. B, F , and I3. C, D, and E4. D, H, and I
BLOOD FLOW THROUGH THE BODY1 . It all starts in the right atrium Blood returns to the heart from the body and goes to the right atrium
BLOOD FLOW THROUGH THE BODY2. When the right atrium fills up, the blood moves to right ventricle *Valves separate the ventricles from the atria
BLOOD FLOW THROUGH THE BODY3. When the right ventricle contracts blood goes to the lungs (getsOxygen) *Valves separate the ventricles from the atria
BLOOD FLOW THROUGH THE BODY4. Blood returns from the lungs to the left atrium with oxygen
BLOOD FLOW THROUGH THE BODY5. After the left atrium fills up, the blood enters the left ventricle *Valves separate the ventricles from the atria
BLOOD FLOW THROUGH THE BODY6. The left ventricle contracts and sends oxygenated blood to thebody *Valves separate the ventricles from the atria
REGENTS REVIEW QUESTIONS The diagram represents the pathway of the blood throughout the body. Which structure pumps oxygenated blood throughout the body?1. structure 12. structure 83. structure 94. structure 10
FLOW OF BLOOD1. Right atrium2. Right Ventricle3. Lungs4. Left atrium5. Left Ventricle6. Body
T YPES OF CIRCULATION Pulmonary Circulation Blood from right side of heart goes to lungs to get oxygen Oxygen taken in from lungs, C02 given to lungs Systemic Circulation Left side of the heart pumps blood with oxygen to rest of body
REGENTS REVIEW QUESTIONS Identify the part of the cell that mimics the function of the circulatory system.1. Cell membrane2. Cytoplasm3. Nucleus4. Mitochondrion
REGENTS REVIEW QUESTIONS The diagrams show various organ systems. Cardiovascular diseases interfere most directly with the normal functioning of1. system E2. system G3. system C4. system D
REGENTS REVIEW The diagram represents several major circulatory pathways in the human body. Which sequence represents the normal blood flow in circulation to the lungs?1. 2 → 5 → 7 → 42. 4 → 8 → 1 → 63. 1 → 6 → 2 → 54. 5 → 7 → 3 → 8