Page 104 - Biology Form Two

Chapter Five

Transport of materials
FOR ONLINE READING ONLY

in mammals

Introduction

Complex animals like mammals have an elaborate and efficient transport system
called the circulatory system that ensures effective circulation of nutrients,
respiratory gases, and other materials in the body. In this chapter, you will learn
about the mechanisms for transporting of materials in the human body, which
include the mammalian heart, blood vessels, blood and blood circulation. The
competences developed will enable you to explore the components and functions
of the human circulatory system. You will also be able to maintain a healthy
lifestyle that helps to control or prevent some diseases and disorders of the blood
circulatory system.

Think the body via the blood vessels. Blood
Life of a mammal without blood vessels circulation enables the supply of
oxygen, nutrients, and hormones to cells
The mammalian heart throughout the body. It also enables
transport of carbon dioxide and other
Task 5.1 wastes from the cells of the body.

Search the library and internet sources
for the structure of the mammalian heart. The external structure of the
Then, write short notes on the structure. mammalian heart
The mammalian heart is broader at
the top and narrower at the bottom.
The human heart is an example of a It is enclosed in a double layer of
mammalian heart. It is located in the tough inelastic membrane called the
center of the chest cavity between the pericardium. The pericardium is a thick,
two lungs. Usually, it slightly points membranous, fluid-filled sac which
to the left side of the chest. Its major encloses, protects, and nourishes the
function is to pump blood throughout heart. It prevents the heart from over-

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BIOLOGY FORM 2 NEW.indd 98
BIOLOGY FORM 2 NEW.indd 98 05/10/2024 15:36:37