Organisation: The Cardiovascular & Respiratory System
1. This question has 4 part(s).
1.1. Figure 3 shows the cross-section of three types of blood vessels.
Figure 3
Choose which option shows the correct names for the vessels X, Y and Z.
1.2. During a biology lesson, a student writes down the following statement.
"Veins always carry deoxygenated blood"
Suggest why this statement is incorrect.
1.3. Figure 4 shows a longitudinal section of a vein.
Figure 4
Suggest why blood does not flow in the direction S → T .
1.4. Complete the following sentences.
Choose answers from the box
low increases high decreases thick capillary vein thin |
____________ walls are usually one cell thick which _____________ the rate of diffusion by decreasing the distance over which it occurs.
The heart pumps blood at __________ pressure so artery walls are _________ compared to the size of the lumen
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
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