Introduction
Good afternoon, everyone!
My name is Francis BC, and in today’s tutorial, we will review biology past questions based on the circulatory system. These questions are drawn from examinations ranging from 1978 to 2024, providing a rich mix of foundational and modern concepts. Our focus will be on understanding blood flow, heart structure, and key vessels involved in circulation.
You can watch the full class in the video below:
Question 1: Sequence of Blood Flow from Heart to Tissue
Question:
Which of the following describes the sequence of flow of blood from the heart to the tissue?
Explanation
Blood circulation involves the pumping of blood from the heart into various tissues through different blood vessels. The correct flow is:
- A) Heart → Artery → Arteriole → Tissue (Correct)
- B) Heart → Vein → Tissue (Veins carry blood back to the heart, not away.)
- C) Heart → Venule → Tissue (Venules are small veins; they do not carry blood away from the heart.)
- D) Heart → Atria → Tissue (Atria are chambers inside the heart; blood exits via arteries, not atria.)
Correct Answer: A
Question 2: Structure Responsible for Blood Pumping in Mammals
Question:
What is the primary structure responsible for pumping blood in the mammalian circulatory system?
Explanation
The heart is the main pumping organ, and its left ventricle is specifically responsible for pumping oxygenated blood to the entire body through the aorta.
- A) Upper auricle (Collects blood, does not pump it to the body.)
- B) Arteries (Carry blood but do not generate pumping force.)
- C) Left ventricle (Correct – pumps blood into systemic circulation.)
- D) Veins (Return blood to the heart, no pumping action.)
Correct Answer: C – Left ventricle
Why This Topic Is Important
Understanding blood flow and heart anatomy is vital for mastering topics like:
- Systemic and pulmonary circulation
- Arteries, veins, and capillaries functions
- Heart chambers (atria vs ventricles)
- Common exam questions on mammalian circulatory system
Watch more educational videos and past questions: https://youtube.com/@allcbts
Conclusion
In this tutorial, we explained how blood flows from the heart to tissues and identified the left ventricle as the key pumping structure in mammals. Mastering these concepts is essential for excelling in biology exams such as WAEC, NECO, and JAMB, as well as university-level courses.
Related Videos:
- Understanding Waves and Properties in Physics
- Physics Post UTME Questions
- Biology Past Questions For UTME
- Biology Past Questions: Introduction to Ecology
- Mathematics Post UTME Questions
SEO Keywords
- biology circulatory system past questions
- WAEC NECO JAMB biology solved questions
- blood flow sequence from heart to tissue
- left ventricle function in mammals
- arteries veins and arterioles explained
- mammalian heart anatomy and physiology
- systemic and pulmonary circulation questions
- biology multiple-choice questions for exams
- 1978–2024 biology past questions solved
- JAMB WAEC biology tutorial on circulation