W.M.NTWE

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• Animals that use internal fertilization specialize in the protection of the developing egg

• the eggs are fertilized within the female reproductive tract

• internal fertilization requires copulatory organs

• the physical union between a male and a female’s reproductive parts. It may or may not result in successful fertilization.

INTERNAL FERTILIZATION

Sexual Reproduction Occurs in most animals Male animals have a special structure to insert their sperm into the female

An egg (female cell) combines with sperm (male cell)

SEXUAL REPRODUCTION TYPES

Pollination & Fertilization

External Fertilization

Internal Fertilization

Occurs in which organisms?

Plants Aquatic animals Most animals and aquatic mammals

Occurs in which environments?

Land Water Mostly land and some water

Males and females touch/join?

No No Yes

Key Vocabulary Pollen = male sex cellStamen = male flower structurePistil = female flower structure

Sperm = male sex cellEgg/ova = female sex cell

Sperm = male sex cellEgg/ova = female sex cell

Internal Fertilization (in most animals)

TYPES OF SEXUAL REPRODUCTION:

INTERNAL FERTILIZATION

Sexual Reproduction Occurs in most animals Male animals have a special structure to insert their sperm into the female

An egg (female cell) combines with sperm (male cell)

• the eggs are fertilized outside of the body

• occurs mostly in wet environments and requires both the male and the female to release their gametes into their surroundings (usually water)

1. it results in the production of a large number of offspring

2. environmental hazards such as predators greatly reduce the chance of surviving into adulthood

External Fertilization (in many aquatic animals)

TYPES OF SEXUAL REPRODUCTION:

EXTERNAL FERTILIZATION (IN MANY AQUATIC ANIMALS)

Sexual Reproduction Occurs inside the water Eggs (female cells) are released into the water and sperm (male cells) are released near the eggs

Males and females don´t need to touch each other

REFERENCES

http://www.slideshare.net/portia201182750/unit-5-animal-reproduction-and-development-22608062?qid=9618d28f-e101-4400-a72e-a753a668bd7c&v=qf1&b=&from_search=4

http://www.slideshare.net/mcodin22/animal-reproduction-31836229?qid=9618d28f-e101-4400-a72e-a753a668bd7c&v=qf1&b=&from_search=1

http://www.slideshare.net/dindin04/animal-reproduction?qid=9618d28f-e101-4400-a72e-a753a668bd7c&v=qf1&b=&from_search=11