human reproductive systems

• label the male reproductive system

  A) bladder

  B) sperm duct

  C) urethra

  D) penis

  E) testis

  F) scrotum

  
• fill in the blanks in the function table

  A) semen

  B) sperm

  C) urethra

  D) urine

  E) semen

  F) muscle

  G) scrotum

  H) sperm

  I) testes

  J) lower

  K) urine

  L) semen

  
• label the female reproductive system

  A) oviduct

  B) ovary

  C) uterus

  D) cervix

  E) bladder

  F) urethra

  G) vagina

  
• fill in the blanks in the function table

  A) uterus

  B) ovum

  C) fertilisation

  D) hormones

  E) lining

  F) zygote

  G) muscle

  H) uterus

  I) sperm

  
• a gamete is a sex cell produced by meiosis
• gametes differ from normal cells as they contain half the number of chromosomes found in other body cells
• a sperm cell contains enzymes in the head region (acrosome)
• sperm cell vs egg cell

  A) acrosome

  B) haploid

  C) mitochondria

  D) tail

  E) cytoplasm

  F) membrane

  
• fill in the adaptive features table

  A) swim

  B) digest

  C) energy

  D) respiration

  E) fertilisation

  F) barrier

  
• fill in the comparison of gametes table

  A) round

  B) jelly

  C) locomotion

  D) huge

  E) month

  
• what is fertilisation?

  it is the fusion of the nuclei form a male gamete and a female gamete
• fertilisation:

  1. during ejaculation in male, millions of sperm cells move along in the sperm duct
  2. the sperm are suspended in semen (fluid secreted by the prostate gland)
  3. the semen passes into the urethra
  4. the sperm cells then follow a chemical trail and travel through the plug of mucus in the cervix to reach the uterus
  5. if a sperm cell meets an egg cell in the oviduct, fertilisation can occur
• when does fertilisation occur?

  most likely to occur 1-2 days after the female has ovulated (released an egg cell from one of her ovaries into an oviduct)
• when the male and female gametes fuse, they become a zygote (fertilised egg cell)
• during fertilisation, the head of a sperm cell releasees enzymes that digest a path through the protective outer layer of the egg cell, allowing the sperm to pass through the egg cell membrane --> the egg cell immediately releases a thick layer of material that prevents any more sperm cells from entering, ensuring only 1 sperm cell can fertilise the egg cell
• how many chromosomes does a zygote contain?

  46 (23 pairs)
• the zygote divides by mitosis to form 2 new cells, which then continue to divide like this until an embryo is formed after a few days
• cell division continues and eventually many of the new cells produced become specialised to perform particular function and form all the body tissues of the offspring
• fill in the blanks about fertilisation in humans

  A) chemical

  B) oviduct

  C) cytoplasm

  D) membrane

  E) jelly

  F) 23

  G) 23

  H) nucleus

  I) head