7C Cells & Fertilisation Revision

What do you need to know about?

  • Name the main organ systems and state their functions
  • Give the jobs of organs and say which system they are part of.
  • Know the main parts of a plant and animal cell, and describe their jobs.
  • Explain how the structure of specialised cells helps them carry out their function.
  • Be able to explain changes that happen during puberty.
  • Be able to state the names and functions of the main parts of the male and female reproductive systems.
  • Explain how fertilisation happens.
  • Explain how a baby develops.
  • Consider different reasons people may have for making decisions about the uses of Science

Tissues & Organ Systems

Organ Systems

What are the main organ systems and which organs do they include?

Main Organs

Can you explain the main roles for each organ?

Plant & Animal Cells

What are the main differences between a plant and an animal cell?

Specialised Cells

How is each specialised cell designed to perform its job?

Changes During Puberty

What are the main changes that males and females undergo during puberty?

Reproductive Systems: Males & Females

Can you identify the main parts of the male and female reproductive systems?

Cells & Fertilisation

Check out the stages of fertilisation, by scrolling through the pictures in order...

How a Baby Develops

When does the embryo turn into a foetus? What happens during each month of development?

The Female Menstrual Cycle

The menstrual cycle is the scientific term for the physiological changes that can occur in women for the purposes of fertilisation. This article focuses on the human menstrual cycle, a "monthly" cycle that takes approximately 28 days to complete although this does vary from person to person. In the menstrual cycle, changes occur in the female reproductive system as well as other systems (which lead to mood changes, for example).

The first stage starts the lining of the uterus breaking out and coming out of the vagina. This is known as a period and usually lasts 5 days. From day 6 to day 13 the lining of the uterus builds up again and the egg in the ovary begins to grow ready to be released. Halfway through the cycle, on day 14, one egg is released into the fallopian tube. For the rest of the 14 days the egg cell slowly moves down the fallopian tubes. If the egg is un-fertilised by day 28 the lining of the uterus breaks down and the egg is ejected from the vagina with the lining.