Tag: HSB Section A

Cells which make up the Human Body

For the functions of various cell structures, see this post. In today’s post we will look at some of the different cells which make up the human body. They are: Epithelial cells Sperm cells Egg cells Nerve cells Muscle cells Epithelial Cells There are four major tissues in the human body: connective, muscle, nervous and…...

Characteristics of Living Organisms: Movement and Reproduction

Movement Movement is one of the characteristic features of living organisms; it is defined as the change in place or position by the entire body or by one of its parts. There are two types of movement in animals: muscular and non muscular. Muscles and bones work together in the body for movement to occur.…...

Characteristics of Living Organisms: Growth and Irritability

Despite the fact that these two characteristics are combined in one post they are absolutely different from each other and are considered separately below. Growth This is defined as the irreversible increase in the dry mass of an organism. It is brought about by an increase in cell size or number. Growth results in organisms…...

Characteristics of Living Organisms: Excretion

In the most simple terms, excretion is the process by which the body eliminates waste. We know based on the previous post on respiration, that carbon dioxide is released from the lungs on expiration. However carbon dioxide is not the only waste product that needs to be eliminated from the body. The unwanted remnants of…...

Characteristics of Living Organisms: Respiration

Respiration is the process by which energy is released from glucose for use in the body. This process can be aerobic or anaerobic. Aerobic Respiration This type of respiration requires oxygen. So in essence energy is released from glucose with the use of oxygen. The equation can be summarised below: We obtain glucose from the…...

Characteristics of Living Organisms: Nutrition

  Nutrition is the process by which we take food into our bodies and use it as raw materials for growth, fuel for energy, and vitamins and minerals that keep your body healthy and functioning properly. It is a delicate balance between what we ingest and our body’s metabolic demands. Nutrients are the molecules in…...