Educational worksheet focusing on human reproduction and pregnancy stages, designed for learning and assessment.

Let's solve each part of this worksheet step by step.

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1. Read and complete the sentences. Then put them in the correct order.

We need to:
- Fill in the blanks.
- Arrange the sentences in chronological order (the correct sequence of events in human reproduction).

#### Completed Sentences:
a. The embryo attaches itself to the wall of the uterus.
b. One of the sperm cells travelling up the fallopian tube joins with the egg cell.
c. The zygote divides many times and forms an embryo.
d. A mature ovum (egg) is released by one of the ovaries.
e. A fertilised ovum is called a zygote.

#### Correct Order:
Now, let’s place these in the correct biological sequence:

1. d. A mature ovum is released by one of the ovaries. → *Ovulation*
2. b. One of the sperm cells travelling up the fallopian tube joins with the egg cell. → *Fertilization*
3. e. A fertilised ovum is called a zygote. → *Result of fertilization*
4. c. The zygote divides many times and forms an embryo. → *Cell division*
5. a. The embryo attaches itself to the wall of the uterus. → *Implantation*

✔ Final Order:
d → b → e → c → a

So, fill in the circles like this:
- a. (5)
- b. (2)
- c. (4)
- d. (1)
- e. (3)

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2. Read the sentences and write first stage, second stage or third stage.

This refers to the three stages of labor during childbirth.

#### Stages of Labor:
- First Stage: Dilation of the cervix (from 0 to 10 cm).
- Second Stage: Delivery of the baby.
- Third Stage: Delivery of the placenta.

Now match:

a. The placenta is expelled from the vagina. → Third stage
b. The mother helps to push the baby out through the cervix. → Second stage
c. The muscles in the uterus contract and gradually widen the cervix. → First stage
d. The contractions continue to push the baby down towards the vagina. → Second stage
e. The umbilical cord is cut to separate the baby from the mother. → Second stage
f. This stage is usually the longest. → First stage (since dilation takes the most time)

✔ Answers:
a. Third stage
b. Second stage
c. First stage
d. Second stage
e. Second stage
f. First stage

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3. Read and match

Match the definitions on the left to the correct term on the right.

| Definition | Term |
|----------|------|
| 1. A link between the placenta and the foetus. | UMBILICAL CORD |
| 2. Muscles connecting the uterus to the vagina. | CERVIX |
| 3. A large organ that develops during pregnancy. | PLACENTA |
| 4. Liquid inside the amniotic sac that protects the foetus. | AMNIOTIC FLUID |
| 5. The female organ in which the foetus develops. | UTERUS |
| 6. The unborn life form that develops from an embryo. | FOETUS |

✔ Matching:
1 → Umbilical Cord
2 → Cervix
3 → Placenta
4 → Amniotic Fluid
5 → Uterus
6 → Foetus

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✔ Final Answers Summary:

#### 1. Complete and Order:
- a. uterus → (5)
- b. sperm cells → (2)
- c. embryo → (4)
- d. ovum → (1)
- e. zygote → (3)

Order: d, b, e, c, a

#### 2. Stages of Labor:
a. Third stage
b. Second stage
c. First stage
d. Second stage
e. Second stage
f. First stage

#### 3. Match:
1 → Umbilical Cord
2 → Cervix
3 → Placenta
4 → Amniotic Fluid
5 → Uterus
6 → Foetus

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