Biology (9-1) - 0970 CIE

Blood Vessels

Gbogbo ọrọ náà

Blood travels around your body through three kinds of vessel, each built for a different part of the journey: thick muscular arteries that withstand high pressure, thin-walled capillaries where exchange happens, and wide veins with valves that return blood gently to the heart.

In this lesson you will learn the structure of arteries, veins and capillaries and where the main vessels are found. Extended students will explain how each vessel's structure fits the pressure it carries and the job it does, and meet the special vessels that serve the liver.

Ebumnobi

Describe the structure of arteries, veins and capillaries, limited to: relative thickness of wall, diameter of the lumen and the presence of valves in veins
State the functions of capillaries
Identify in diagrams and images the main blood vessels to and from the: (a) heart, limited to: vena cava, aorta, pulmonary artery and pulmonary vein (b) lungs, limited to: pulmonary artery and pulmonary vein (c) kidney, limited to: renal artery and renal vein
[Supplement] Explain how the structure of arteries and veins is related to the pressure of the blood that they transport
[Supplement] Explain how the structure of capillaries is related to their functions
[Supplement] Identify, in diagrams and images, the main blood vessels to and from the liver as: hepatic artery, hepatic veins and hepatic portal vein

Akọmọ Ojú-ẹkọ

The three vessel types are a perfect example of structure fitting function, a theme examiners return to again and again. Knowing the named vessels of the heart, lungs and kidneys also lets you trace blood through the whole body, which underpins many circulation questions.

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Ayẹwo Ẹkọ

Ekele diri gi maka imecha ihe karịrị na Blood Vessels. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

Which vessel has the thickest, most muscular wall? A. vein B. capillary C. artery D. lacteal Answer: C
Valves are found in: A. arteries away from the heart B. capillaries C. veins D. the aorta only Answer: C
The wall of a capillary is: A. one cell thick B. very muscular C. full of valves D. impermeable Answer: A
Blood is carried away from the kidney by the: A. renal artery B. renal vein C. hepatic vein D. pulmonary vein Answer: B
[Supplement] Blood rich in digested food is carried to the liver by the: A. hepatic artery B. hepatic vein C. hepatic portal vein D. renal artery Answer: C