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Because of their functions. Arteries have a very thick middle and outer layers because they have to bear the high pressure of blood coming from the heart. The walls of veins are thin because they carry blood at low pressure (but they have valves), and capillaries are only one cell thick because they have to exchange nutrients and wastes with the interstitial fluid.
What else can I help you with?
How many mm in an average textbook?
it depends on the size of the book also its thickness.
What does it mean if two DNA sample showed an identical pattern and thickness of been produced by Gel electrophoresis?
By the same amount of DNA, fragments of the same size and the same DNA molecules. WRONG The real answer on the people who have multiple choice or e2020 It would be "all the above"
What is 0.003 inches similar in size too?
About the thickness of a hair of your head.
What is thickness of rod?
The thickness of a rod refers to its diameter or cross-sectional size, which can vary depending on the specific rod being discussed. It is typically measured in millimeters or inches.
What is the difference between human and rat spermatozoa?
Human spermatozoa are longer and have a different shape compared to rat spermatozoa. Additionally, human spermatozoa have a higher motility rate and larger head size in comparison to rat spermatozoa. These differences contribute to the variations in reproductive strategies between humans and rats.
What is a explanation for the differences in size and thickness of the different vessels?
Arteries are thicker and have more smooth muscle to withstand high pressure and maintain blood flow. Veins are thinner and contain valves to prevent backflow of blood. Capillaries are tiny and thin-walled to facilitate gas exchange between blood and tissues.
What is a closed blood system?
Closed circulatory systems have the blood closed at all times within vessels of different size and wall thickness. In this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities.
Differences between vasodilation and vasoconstriction?
Vasodilation is relaxation of blood vessels leading to increase in lumen size. Vasoconstriction is contraction of blood vessels leading to decrease in lumen size.
What is the nominal wall thickness in a shell or head of vessels?
technically nominal wall thickness refers to pipe wall thickness (average)..if you are referring to shell/hull/fore part of a vessel, the thickness varies depending of type, size, deadweight of the vessel
What happens to blood vessel size?
The size of blood vessels varies enormously, from a diameter of about 25 mm (1 inch) in the aorta to only 8 μm in the capillaries.
What kind of different vessels travel through water?
Different vessels that travel through water include ships, boats, submarines, and ferries. These vessels vary in size, design, and purpose, such as cargo ships for transporting goods, sailboats for leisure, and military submarines for covert missions.
Are all human bones the same size in diameter do women have the same size bones or are some bigger boned smaller bone?
No, not all human bones have the same diameter. There can be differences in bone size and thickness among individuals due to factors like genetics, age, and sex. Generally, men tend to have larger and denser bones compared to women due to differences in hormone levels and body composition.
What is the thickness of A4 size paper?
1mm
Are the blood vessels the same size?
no
Size of a penny?
The diameter is 19mm, thickness is 1.55mm.
What is the size of penny?
The diameter is 19mm, thickness is 1.55mm.
What is the abbreviation for the term "gauge" commonly used in the context of measuring thickness or size?
The abbreviation for the term "gauge" commonly used in the context of measuring thickness or size is "ga."
