Subject: Basic Science

Topic: The Human Body System – The Reproductive System

Class: Grade 5 (Primary 5)

Curriculum: Nigerian National Curriculum (UBE)

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Introduction

All living things have the ability to produce young ones of their own kind so that life can continue on Earth. This biological process of producing offspring (babies) is called reproduction.

The group of organs in our bodies that work together to make this process possible is called the reproductive system. Unlike other body systems (like the digestive or circulatory systems) which are the same in everyone, the reproductive system is different in males and females.

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The Male Reproductive System

The male reproductive system is designed to produce and deliver male reproductive cells called sperm. Sperm cells are very tiny and can only be seen under a microscope.

The main parts of the male reproductive system include:

1. The Testes (singular: testis): These are two oval-shaped organs held in a soft bag of skin called the scrotum. Their main job is to produce sperm cells.
2. The Penis: This is an external muscular organ. It is used to pass urine out of the body and also to release sperm into the female body during reproduction.
3. The Sperm Ducts: These are narrow tubes that carry sperm from the testes to the penis.

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The Female Reproductive System

The female reproductive system is designed to produce female reproductive cells, receive sperm, and carry a developing baby. Females are born with all their eggs, which mature as they grow older.

The main parts include:

1. The Ovaries: These are two small, almond-shaped organs that produce female reproductive cells called eggs (or ova).
2. The Oviduct (Fallopian Tube): This is a narrow tube through which the mature egg travels from the ovary. This is also where the sperm meets the egg.
3. The Uterus (Womb): This is a hollow, pear-shaped muscular organ where a baby stays, grows, and develops for nine months before birth.
4. The Vagina: This is a muscular tube that connects the womb to the outside of the body. It is also known as the birth canal.

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How Reproduction Works

For reproduction to occur, a male sperm cell must join with a female egg cell. This joining is called fertilization.

Once fertilization happens in the oviduct, the fertilized egg moves down and attaches itself to the wall of the uterus (womb). There, it grows into a baby, receiving food and oxygen from the mother. After about nine months, the baby is fully formed and is born through the vagina.

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Care and Hygiene of the Reproductive Organs

Because these organs are very sensitive, we must keep them clean to prevent infections and stay healthy:

1. Bath Daily: Wash your private parts gently with clean water and mild soap every day.
2. Wear Clean Underwear: Change your underwear daily. Use clean, dry cotton underwear, and avoid wearing clothes that are too tight.
3. Wipe Correctly: After using the toilet, girls should always wipe from front to back to prevent transferring germs to the vagina.
4. Report Changes: Always tell a parent, guardian, or doctor if you feel any itching, pain, or notice an unusual discharge.

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Summary

• Reproduction is the process by which living things produce young ones of their own kind.
• The male reproductive cells are called sperm, produced by the testes.
• The female reproductive cells are called eggs (ova), produced by the ovaries.
• Fertilization is the joining of a sperm and an egg cell.
• The uterus (womb) is where the baby grows and develops for nine months.
• Keeping our reproductive organs clean through daily bathing and wearing clean cotton underwear prevents infections.

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Classwork / Evaluation

Section A: Multiple Choice

1. The process of producing young ones of the same kind is called __________.
   a) Digestion
   b) Reproduction
   c) Respiration
2. Which of these organs produces sperm in males?
   a) Ovaries
   b) Testes
   c) Uterus
3. The pear-shaped organ where the baby grows for nine months is the __________.
   a) Vagina
   b) Oviduct
   c) Uterus
4. The joining of a male sperm and a female egg is known as __________.
   a) Fertilization
   b) Excretion
   c) Circulation

Section B: Short Answer Questions

1. Mention two ways to care for your reproductive organs.
2. State the function of the ovaries in the female reproductive system.