Growth And Development 1

Question 1

The day of birth marks the beginning of what period

Answer 1

Postnatal period

Question 2

When the male sperm and female ovum unite

Answer 2

Fertilization

Question 3

About how long does the prenatal period last

Answer 3

39 weeks

Question 4

Science of the development of the offspring before birth

Answer 4

Embryology

Question 5

What is a fertilized ovum

Answer 5

A zygote

Question 6

Where is the ovum fertilized

Answer 6

In the Fallopian tube or outter one third of the ova duct

Question 7

Milton division begins immediately and about three days after fertilization what is created?

Answer 7

Solid mass of cells called morula

Question 8

Hollow ball of cells when the zygote reaches the uterus

Answer 8

Blastocysts

Question 9

After ten days, what happens with the embryo

Answer 9

It implants in the lining of the uterus

Question 10

Two cavities of the blastocyst

Answer 10

Yolk sac and amniotic cavity

Question 11

What is the function of the yolk sac in humans?

Answer 11

Produces red blood cells

Question 12

What is the function of the amniotic sac?

Answer 12

Bag of waters in which the embryo floats during development

Question 13

Develops into an important fetal membrane in the placenta

Answer 13

Chorion

Question 14

Connects the blood vessels of the chorion to the rest of the placenta

Answer 14

Chorionic villi

Question 15

Function of placenta

Answer 15

Anchors developing fetus to the fall of the uterus and provides a bridge for the exchange of nutrients and waste products between mother and baby

Question 16

The placenta also serves as the

Answer 16

Respiratory and endocrine organ

Question 17

Maternal blood fills what part of the placenta

Answer 17

Lacunae of the placenta

Question 18

The length of permanent or prenatal development is also called the

Answer 18

Gestation period

Question 19

The gestation period is broken into 3 periods called

Answer 19

Trimesters

Question 20

Stage of development that extends from about the third week of gestation until week 8

Answer 20

Embryonic phase

Question 21

What term is used to define the developing offspring on the first trimester?

Answer 21

Embryo

Question 22

Stage from week 9 to week 39 after gestation

Answer 22

Fetal phase

Question 23

During the fetal stage, the baby is referred to as

Answer 23

The fetus

Question 24

Description of an embryo by day 35

Answer 24

Heart is beating, 8mm long, eyes and limb buds visible

Question 25

Description of a fetus at the end of the first trimester

Answer 25

7 to 8 cm, apparent facial features, complete limbs, gender identifiable

Question 26

Description of fetus by 4 months

Answer 26

All organ systems are complete and in place

Question 27

All of the cells are what at the very beginning of the embryonic stages?

Answer 27

Stem cells

Question 28

The three layers of stem cells developed early in the first trimester

Answer 28

Primary germ layers

Question 29

3 primary germ layers

Answer 29

Endoderm, ectoderm, and mesoderm

Question 30

What do the ectoderm skin cells produce?

Answer 30

Epidermis of skin, tooth enamel, lens and cornea of eye, outer ear, nasal cavity, facial bones, skeletal muscles in head, brain and spinal cord, sensory neuron's

Question 31

What do the mesoderm stem cells develop into

Answer 31

Dermis of skin, circulatory system, many glands, kidneys, gonads, muscle, bones (except facial)

Question 32

Endoderm stem cells develop into

Answer 32

Lining of the gastrointestinal tract, linings of lungs, lining of hepatic and pancreatic ducts, kidney ducts and bladder, anterior pituitary gland, thymus gland, thyroid gland, parathyroid gland, tonsils, adrenal medulla

Question 33

Process of how the primary germ layers develop into many different types of tissues

Answer 33

Histogenesis

Question 34

The ways in which tissues form themselves into organs after Histogenesis is called

Answer 34

Organogenesis

Question 35

Developmental problems present at birth

Answer 35

Birth defects

Question 36

Environmental factors that cause birth defects

Answer 36

Teratogens

Question 37

Critical period of development for the central nervous system

Answer 37

Week 3-38

Question 38

Critical period for the development of the heart

Answer 38

Weeks 3-8

Question 39

Critical period for development for the upper limbs and lower limbs

Answer 39

Weeks 4-8

Question 40

Critical period for development for ears

Answer 40

Weeks 4-20ish

Question 41

Critical period for development for eyes

Answer 41

Weeks 4-38

Question 42

Critical period for development for teeth

Answer 42

Weeks 6-38

Question 43

Critical period for development for palate

Answer 43

Weeks 6-9

Question 44

Critical period for development for external genitalia

Answer 44

Weeks 7-38

Question 45

Day of birth marks the end of what period

Answer 45

Prenatal period