Which of the following blood vessels have valves?

Assessment: WAEC SSCE - Biology - 2007 (Objective) Subject: Biology

Question 1 Report

Which of the following blood vessels have valves?
Answer Details
Valves are flap-like structures that prevent the backward flow of blood in a vessel. Capillaries and arterioles do not have valves. Arteries carry oxygen-rich blood away from the heart and do not need valves to prevent backflow because the blood is under high pressure. Veins, on the other hand, carry oxygen-poor blood back to the heart and are under low pressure. To prevent the backflow of blood, veins have valves that keep the blood flowing in the right direction towards the heart. Therefore, the blood vessels that have valves are veins.
Read lesson note on Transport System (WAEC)
Read lesson note on Classification (WAEC)
View Answer

Related Questions

1

The dominant stage in the life cycle of a fern is the
2

Organisms that interbreed to produce fertile offspring belong to the same
3

A change in the environment of an organism is termed
4

The hereditary material in a living organism is located inside the
5

Respiration is an essential life process providing the living cells with
6

The transfer of ripe pollen grains from the anther to the stigma of the same flower is termed
7

The organelle involved in the transport of substances within a cell is
8

Which of the following processes takes place when a plant cell is put in a hypotonic solution?

Download The App On Google Playstore

Everything you need to excel in your exams

Green Bridge CBT Mobile App
Personalized AI Learning Chat Assistant
200,000+ Exam Questions Across IGCSE, JAMB, WAEC & NECO
Over 3,900 Lesson Notes
Offline Support - Learn Anytime, Anywhere
Green Bridge Timetable
Literature Summaries & Potential Questions
Track Your Performance & Progress
In-depth Explanations for Comprehensive Learning