The Circulatory System WHAT IS THE CIRCULATORY SYSTEM

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The Circulatory System

The Circulatory System

WHAT IS THE CIRCULATORY SYSTEM? ? Functions: • Facilitates ________ • Delivers _______ to

WHAT IS THE CIRCULATORY SYSTEM? ? Functions: • Facilitates ________ • Delivers _______ to cells • Picks up cellular _______ • _________ regulation • Delivers _________

The circulatory system in humans contains 3 parts: 1) ______ – The circulating fluid.

The circulatory system in humans contains 3 parts: 1) ______ – The circulating fluid. 2) _________ – The transporting medium. 3) _____ – The pumping station.

PART ONE: THE BLOOD The average human adult has _____ litres of blood (~8%

PART ONE: THE BLOOD The average human adult has _____ litres of blood (~8% weight). • Functions of the blood: – ________: Oxygen, carbon dioxide, wastes, nutrients, heat, hormones – ________: p. H, temperature – ________: white blood cells – _______: prevents blood loss (platelets)

THE BLOOD Blood is composed of two parts: ______ (a complex fluid); and formed

THE BLOOD Blood is composed of two parts: ______ (a complex fluid); and formed _____ (erythrocytes, leucocytes and platelets). http: //www. youtube. com/watch? v=v. VOz. Krc. TNis&safe=active

1) Blood Plasma • ________ thick fluid • Makes up _______ of blood volume

1) Blood Plasma • ________ thick fluid • Makes up _______ of blood volume • Consists of 91. 5% ______, 7% proteins, and 1. 5% dissolved food, enzymes, vitamins, hormones, antibodies, waste products, inorganic salts and gases

2) Erythrocytes • _____________ (45% of blood) • 5 million per m. L of

2) Erythrocytes • _____________ (45% of blood) • 5 million per m. L of blood (25 trillion in human body!!!) • Every sec you produce ~10 million new RBC’s • Formed in ____________ (inside your bones) • Have no _______ • Life span of ______ days • About 2 million dead erythrocytes must be removed from the blood every second. • They are destroyed and filtered out by the _____ and ______.

2) Red Blood Cells • Red color: due to the presence of the protein

2) Red Blood Cells • Red color: due to the presence of the protein _______.

2) Red Blood Cells • Concave shape gives the cell a large ____________ through

2) Red Blood Cells • Concave shape gives the cell a large ____________ through which oxygen can diffuse. • Also makes them _______, easily squeeze through capillaries. • Blood changes colors: – Oxygenated Deoxygenated (_____) (______)

3) Leukocytes • ____________ (~1% of blood) • Larger cells, but less numerous than

3) Leukocytes • ____________ (~1% of blood) • Larger cells, but less numerous than erythrocytes 5 – 10 thousand per m. L • They are _______ shaped cells that contain a _______ • Cells live between 12 hours to several years • Main function is to _______ the body from foreign material such as _____ by engulfing them (phagocytosis).

4) Platelets • Smallest cellular components • No ______, live 5 -9 days •

4) Platelets • Smallest cellular components • No ______, live 5 -9 days • Produced in the _____ marrow • 250, 000 platelets per m. L of blood • Platelets are responsible for the initial stages of _____________.

Platelets and Clot Formation • Blood must have the ability to “_______” wounds (cuts

Platelets and Clot Formation • Blood must have the ability to “_______” wounds (cuts and scrapes). • There are four components involved in the clotting process: – __________________

Blood Clotting • Platelets: – Cell fragments – React to the air and become

Blood Clotting • Platelets: – Cell fragments – React to the air and become _____. Forms an initial ____. • Clotting Factors: – 12 Factors needed – They are proteins that _____ the platelet plug.

Blood Clotting • Fibrin: – A web-like protein _______ that strengthens the clot. –

Blood Clotting • Fibrin: – A web-like protein _______ that strengthens the clot. – Fibrin formation = _________ • Other Cells: – White and Red blood cells get _____ and add to the structure. http: //www. youtube. com/watch? v=--b. ZUeb 83 u. U&safe=active

Blood Disorders - Hemophilia ____________ in which a specific blood clotting factor is lacking

Blood Disorders - Hemophilia ____________ in which a specific blood clotting factor is lacking or, a _______ that abnormally delays coagulation when bleeding occurs whether internal or external – Result: Bleeding is difficult to stop. – 400, 000 people are affected (mostly males). – Treatment: __________ can be given to people to aid clot formation. • Biggest concern with this condition? – _________ bleeding