Presentation on theme: "The circulatory system transports blood and other materials."— Presentation transcript:
1 KEY CONCEPT The respiratory and circulatory systems bring oxygen and nutrients to the cells.
2 The circulatory system transports blood and other materials. The respiratory and circulatory systems work together to maintain homeostasis.The circulatory system transports blood and other materials.brings supplies to cellscarries away wastesseparates oxygen-poor and oxygen-rich bloodOxygen-poor bloodOxygen-rich blood
3 The respiratory system is where gas exchange occurs. picks up oxygen from inhaled airexpels carbon dioxide and waternosesinusmouthepiglottistrachealungs
4 The respiratory system moves gases into and out of the blood. The lungs contain the bronchi, bronchioles, and alveoli.Millions of alveoli give the lungs a huge surface area.The alveoli absorb oxygen from the air you inhale.alveolibronchiole
5 Breathing involves the diaphragm and muscles of the rib cage. Air flows from areas of high pressure to low pressure.Air inhaled.Muscles contract andrib cage expands.Diaphragm flattensand moves downward.Air exhaled.Muscles andrib cage relax.Diaphragm relaxesand rises.
6 The circulatory system moves blood to all parts of the body. The system includes the heart, arteries, veins, and capillaries.heart pumps blood throughout bodyarteries move blood away from heartveins move blood back to heartcapillaries get blood to and from cellsveinsarteries
7 There are three major functions of the circulatory system. transporting blood, gases, nutrientscollecting waste materialsmaintaining body temperature
8 KEY CONCEPT The heart is a muscular pump that moves the blood through two pathways.
9 The tissues and structures of the heart make it an efficient pump. Cardiac muscle tissue works continuously without tiring.NORMAL HUMAN HEART
10 The heart has four chambers: two atria, two ventricles. Valves in each chamber prevent backflow of blood.aortic valveleft atriummitral valveleft ventricleseptumpulmonary valveright atriumtricuspidright ventricleMuscles squeeze the chambers in a powerful pumping action.
11 The heartbeat consists of two contractions. SA node, or pacemaker, stimulates atria to contractAV node stimulates ventricles to contractSA nodeVA node
12 Blood flows through the heart in a specific pathway. 3142
13 Blood flows through the heart in a specific pathway. oxygen-poor blood enters right atrium, then right ventricleright ventricle pumps blood to lungsoxygen-rich blood from lungs enters left atrium, then left ventricleleft ventricle pumps blood to body
14 The heart pumps blood through two main pathways. Pulmonary circulation occurs between the heart and the lungs.oxygen-poor blood enters lungsexcess carbon dioxide and water expelledblood picks up oxygenoxygen-rich blood returns to heart
15 Systemic circulation occurs between the heart and the rest of the body. oxygen-rich blood goes to organs, extremitiesoxygen-poor blood returns to heartThe two pathways help maintain a stable body temperature.
16 KEY CONCEPT The lymphatic system provides another type of circulation in the body.
17 The lymphatic system collects fluid that leaks out of the capillaries. Lymph is collected from tissues and returned to the circulatory system.heartlymph nodeslymph vesselsThe lymphatic system collects fluid that leaks out of the capillaries.Lymph vessels have valves to prevent backflow.Lymph nodes filter the lymph and destroy foreign matter.Lymph vessels return cleaned fluid to the circulatory system.If lymph vessels or nodes are damaged, lymph collects in an area.
18 The lymphatic system is a major part of the immune system. tonsilsthymusspleenStructures in the lymphatic system help fight disease.tonsils filter bacteria and virusesthymus develops white blood cellsspleen filters lymph, contains immune cellsLymphocytes help destroy pathogens, parasites, and foreign matter.