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Identify and describe the functions of the labelled parts of the human female reproductive system and list five common laboratory apparatus with their uses.

Biology

ScanSolve AI Answer

1(a)

i) The diagram represents the human female reproductive system. Its primary function is to produce eggs, facilitate fertilization, and provide a suitable environment for the development of an embryo and fetus.

ii)
I: Fallopian tube (or Oviduct)
II: Ovary
III: Uterus
IV: Cervix
V: Vagina

iii)
I (Fallopian tube): Transports the egg from the ovary to the uterus and is the usual site of fertilization.
II (Ovary): Produces ova (eggs) and female hormones like estrogen and progesterone.
III (Uterus): Site where the embryo implants and develops into a fetus.
IV (Cervix): Connects the uterus to the vagina, allowing passage of sperm, menstrual blood, and the baby during birth.
V (Vagina): Receives sperm during sexual intercourse and serves as the birth canal.

iv) Fertilization takes place in the Fallopian tube (I).

v) Implantation of the embryo takes place in the Uterus (III).

1(b)

i)
I: Crucible tongs
II: Stop clock (or Timer)
III: Thermometer
IV: Weighing balance (or Scale)
V: Measuring cylinder

ii)
I (Crucible tongs): Used to hold hot crucibles or other hot apparatus.
II (Stop clock): Used to measure time intervals in experiments.
III (Thermometer): Used to measure temperature.
IV (Weighing balance): Used to measure the mass of substances.

iii)
The major markings on the measuring cylinder are 50, 100, 150, 200, 250 cm³.
There are 5 subdivisions between each major marking (e.g., between 100 and 150).
Each subdivision represents 150−1005=505=10 cm3\frac{150 - 100}{5} = \frac{50}{5} = 10 \text{ cm}^3.
The liquid level (meniscus) is at the second mark above 100 cm³.
So, the volume is 100 cm3+(2×10 cm3)=100 cm3+20 cm3=120 cm3100 \text{ cm}^3 + (2 \times 10 \text{ cm}^3) = 100 \text{ cm}^3 + 20 \text{ cm}^3 = 120 \text{ cm}^3.

The volume of the liquid in instrument V is 120 cm3\boxed{\text{120 cm}^3}.

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