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Life Sci - Chap 26

study guide

Describe asexual reproduction single parent has offspring that is genetically identical
How does an animal bud? parent organism pinches off and forms new organism
What is fragmentation in animals? part of the organism breaks off and develops into an individual that is identical to the original
Describe sexual reproduction 2 parents unite to produce offspring that have both of their traits
The female parent sex cell is? egg
The male parent cell is? sperm
Explain the difference between zygotel and embryo zygote is when egg becomes fertilized by sperm; embryo is when zygote implants itself into uterus.
What is fertilization and where does it typically occur in humans Fertilization is when the egg & sperm unite and become a new life - typically occurs in the fallopian tubes
Describe the differences between external and internal fertilization external fertilization takes place outside the bodies of the parents; internal fertilization takes place inside female's body
Give examples of advantages of external fertilization can produce a large amount of offspring to ensure population continues to survive; more genetic variation
Give examples of advantages of internal fertilization better protects the developing baby; greater chance for successful fertilization
List the three types of mammal reproductive types monotremes, marsupial, and placental mammal
What are monotremes? Give an example of one. Monotremes are mammals that lay eggs. Example: duck bill platypus
What are marsupials? Give and example of a couple of them Marsupials are mammals that give birth to partially developed live young, then those live young stay in the moms pouch to further develop, Examples: kangaroo, oppossum
What are placental mammals? Give an example of three of them. Placental mammals have their young develop inside of them until time for birth. Examples: humans, cows, dogs
List three major parts of the male reproductive system testes, epididymus, vans deferens, penis
Where in the male reproductive system are sperm formed? testes
Where in the male reproductive system are sperm matured? epididymus
How does sperm leave the testicles? Through the vans deferens to the urethra and then out
List four major parts of the female reproductive system ovaries, fallopian tubes, uterus, and vagina
Where in the female reproductive system are eggs formed and released? ovaries
What is the process called when eggs are released? ovulation
How does the egg reach the uterus? It goes from the ovaries through the fallopian tubes to the uterus
What is the purpose of the uterus? It is the place where an embryo forms into a baby until it is ready to be born
The cycle in the female that develops a new egg every 28 days menstrual cycle
Explain the difference between fraternal and identical twins fraternal - two eggs are fertilized at one time/ babies will not necessarily look like each other; identical twins - develop from a single fertilized egg/ babies will be the same sex and most likely look very much like each other
What are STD's? Sexually transmitted diseases like HIV, AIDS, chlamydia, genital herpes, etc
Give two examples of cancer in the reproductive system of males testicular, prostate
Give two examples of cancer in the reproductive systems of females ovarian, cervical, breast
If a male or female can not produce offspring they are called? sterile/ known as infertility
When a zygotes embeds into the uterus this is called? implantation
The placenta provides what? Oxygen and nutrients to the fetus and carries away wastes produced by the fetus
What attaches the placenta to the fetus? the umbilical cord
Explain the differences between an embryo and a fetus embryo - once zygote implants in uterus then it is an embryo until about week 10 then it becomes a fetus.
What surrounds the embryo during pregnancy that protects the embryo? amniotic fluid
At what number of days, weeks and months does a pregnancy last? 270 days, 40 weeks, 9 months
Describe an infant and at what age does it occur? newborn to toddler - 0 to 2 years
Describe a child and at what age does it occur toddler to puberty; 2 thru 9-16
Describe adolescence and what age does it occur boys - between 11 and 16, voice changes become more muscular, grow more hair, girls - between 9 and 14, get more curvy, breasts grow, etc
Describe the age of adult hood young adulthood - ages 20 thru 0 - at top physical peak; after 30 changes happen due to aging; middle age 40-65; older adult - 65 andup
At what age do most individuals start to reach their peak in age? between 20 and 30
Created by: msparks



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