Human reproduction online activity for grade 6 - Free Printable

Here is the complete solution to all three tasks shown in the image:

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Task 4: Identify these organs

Match each organ with its correct description:

✔ PENIS → *The external reproductive organ of the male*
✔ TESTICLES → *Organs that make and store millions of sperm cells*
✔ OVARIES → *Organs that produce egg cells or ovules*
✔ VAS DEFERENS → *Tubes that carry the sperm out of the testes*
✔ VAGINA → *Muscular tube that extends from the vulva to the uterus*
✔ FALLOPIAN TUBES → *Tubes that connect the ovary to the uterus*

> ✔ Explanation:
> - The penis is the male external genitalia used for urination and sexual intercourse.
> - The testicles (or testes) are male gonads that produce sperm and testosterone.
> - The ovaries are female gonads that release eggs (ova) and produce estrogen and progesterone.
> - The vas deferens is a duct that transports mature sperm from the epididymis to the ejaculatory duct.
> - The vagina is the birth canal and also receives the penis during intercourse.
> - The fallopian tubes (uterine tubes) are where fertilization typically occurs — they transport the egg from the ovary to the uterus.

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Task 5: Place these words in chronological order

Order the stages of human development from earliest to latest:

✔ 1ST → OVUM AND SPERM
✔ 2ND → ZYGOTE
✔ 3RD → EMBRYO
✔ 4TH → FETUS
✔ 5TH → BABY

> ✔ Explanation:
> 1. Ovum and Sperm: The egg (ovum) and sperm cell meet during fertilization.
> 2. Zygote: The single-cell result of fertilization — the first stage of a new organism.
> 3. Embryo: From about week 3 to week 8 after fertilization, the developing organism is called an embryo. Major organs begin to form.
> 4. Fetus: From week 9 until birth, the developing organism is called a fetus — growth and refinement of structures occur.
> 5. Baby: After birth, the child is called a baby (or neonate).

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Task 6: Label the sex cells

Label the parts of the sperm and ovum (egg) using the given terms:

Left Image (Sperm Cell):
- Top line pointing to the rounded front part → HEAD
- Bottom line pointing to the long whip-like structure → TAIL

Right Image (Ovum / Egg Cell):
- Line pointing to the outer layer with spiky projections → ZONA PELLUCIDA
- Line pointing to the large central organelle → NUCLEUS
- Line pointing to the inner jelly-like substance → CYTOPLASM

> ✔ Full Labels for Each Diagram:

Sperm Cell:
- Head → Contains genetic material (nucleus) and enzymes to penetrate the egg.
- Tail → Propels the sperm forward via whip-like motion.

Ovum (Egg Cell):
- Zona Pellucida → Glycoprotein layer surrounding the egg; essential for sperm binding and preventing polyspermy.
- Nucleus → Contains the egg’s DNA.
- Cytoplasm → Gel-like substance inside the cell membrane; contains nutrients and organelles to support early development.

> ⚠️ Note: “SPERM” and “OVUM” are the names of the whole cells, not parts — so they are not used as labels for specific structures here.

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✔ Final Answer Summary:

Task 4 Matching:
- PENIS → The external reproductive organ of the male
- TESTICLES → Organs that make and store millions of sperm cells
- OVARIES → Organs that produce egg cells or ovules
- VAS DEFERENS → Tubes that carry the sperm out of the testes
- VAGINA → Muscular tube that extends from the vulva to the uterus
- FALLOPIAN TUBES → Tubes that connect the ovary to the uterus

Task 5 Chronological Order:
1. OVUM AND SPERM
2. ZYGOTE
3. EMBRYO
4. FETUS
5. BABY

Task 6 Labeling:

Sperm:
- Top label → HEAD
- Bottom label → TAIL

Ovum:
- Outer spiky layer → ZONA PELLUCIDA
- Inner circular structure → NUCLEUS
- Main body → CYTOPLASM

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Let me know if you’d like diagrams or flashcards based on this! 🧬👶