Blood Flashcards
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- It is a specialized connective tissue
- Plays an important role in maintaining homeostasis in a living organism
Blood
Physical properties of blood
Average adult = 7-9 % of total body weight.
- Male = 5-6 Liters
- Female = 4-5 liters
Why is the blood red?
Red color of arterial blood is due to oxygenated hemoglobin (Hgb)
Functions of blood
- Transport
- Protection
- Regulation
What function of the blood makes the oxygen travel from the lungs to body tissues
Transport
What function of the blood that can clot preventing excessive loss of blood
Protection
What function of the blood makes the:
- platelets maintain homeostasis - control ph
acid-base balance
- albumin osmotic pressure helps retain water
- help dissipate heat to the environment
Regulation
What are the components of the blood?
- Plasma
Contains:
a. Water
b. Plasma proteins:
(Albumin, Globulin, Fibrinogen)
c. Plasma Electrolytes:
(Cations, Anions)
d. Nutrients and waste products:
(Nutrients, Metabolic wastes)
e. Gases buffers
What is it called to the plasma without the presence of fibrinogen and other protein?
Serum
What are the formed elements (45% of blood composition)
- Whole-cell, cell fragments
a) RBC (red blood cell) - erythrocyte
b) WBC (white blood cell) - leukocyte
c) Platelets - thrombocytes
Percentage by body weight
- Blood
a. Plasma (55%)- 7% protein; 91% water; 2% other solutes
b. Formed elements (45%) - 250-400k platelets; 5-9k WBC; 4.2-6.2
million RBC (45%)
- 7% protein; 91% water; 2% other solutes
Plasma (55% of blood compostion)
- The liquid portion of blood, primarily responsible for transporting nutrients, hormones, and waste products.
- promotes water retention to maintain blood volume and pressure
- it’s like a magnet
Albumin (Plasma protein)
- carrier molecule to transport liquid
and fat-soluble vitamins in the blood - used as antibodies (immunoglobulins)
Globulin (Plasma protein)
Essential for blood clotting.
Fibrinogen
inorganic molecules that separate into
ions when they are dissolved in water.
Plasma Electrocytes
Positively charged ions like Na+ (sodium),
K+ (Potassium), Ca+ (Calcium), Mg²+ (Magnesium)
Cations (Plasma Electrocytes)
Negatively charged ions, including chloride, phosphate, and iodide
Anion (Plasma Electrocytes)
Glucose, amino acid, phospholipid,
triglyceride, free fatty acid, cholesterol
Nutrients (Nutrients and Waste products)
lactic acid, nitrogenous waste (urea)
Metabolic wastes (Nutrients and Waste products)
Oxygen (O2), Nitrogen (N2), and Carbon dioxide (CO2) – principal gases dissolved in plasma
Gases and Buffers
Erythrocytes: Primary function is to transport oxygen throughout the body
Red blood cell (RBC)
Leukocytes: Play crucial roles in the immune system to defend against infections and foreign susbtances.
White blood cells (WBC)
Thrombocytes: Fragments of cells that help in blood clotting and wound repair.
Platelets
- The most numerous blood cells are about one thousand times more numerous than white blood cells
- Shape – biconcave disc (7.5 um – 2.0 um)
- Anucleated – no nucleus in the RBC; but during development it will contain a nucleus
- Absence of cytoplasmic organelles
- Contains oxygen-carrying protein Hemoglobin
that gives blood its red color - Plasma membrane – strong and flexible
- Life span – 120 days
- Old RBC’s are removed by macrophages in spleen
WHATS IS THIS?
Erythrocytes
In the lung’s oxygen binds with _________ iron portion to form _________, when blood reaches the body tissue capillaries, hemoglobin releases oxygen first into interstitial fluid and then to cell for its cellular
metabolism.
- Heme
- Oxyhemoglobin
a waste product of cellular metabolism from the tissue, will bind with globin to form carbaminohemoglobin. As blood flows to the
lungs carbon dioxide is released by hemoglobin and then exhaled.
Carbon dioxide
Carbon dioxide is a waste product of cellular metabolism from the tissue, will bind with _______ to form _____________. As blood flows to the lungs carbon dioxide is released by hemoglobin and then exhaled.
- globin
- carbaminohemoglobin