Identify and explain the functions of parts of the male and female reproductive systems, and the impact of external factors on reproduction.

Here's the solution to the questions: 1.5 Step 1: Identify the labelled parts of the diagram showing a human ovum and sperm. 1.5.1 (a) A: Head (of sperm) 1.5.1 (b) B: Midpiece (of sperm) 1.5.1 (c) C: Tail (of sperm) 1.5.1 (d) F: Acrosome Step 2: Match the functions to the correct letter and name of the part. 1.5.2 (a) Contains the mitochondria: B (Midpiece) 1.5.2 (b) Contains enzymes required to penetrate the ovum: F (Acrosome) 1.5.2 (c) Will enter the ovum during fertilisation: A (Head) 2.1 Step 1: Identify part A in the diagram of the male reproductive system. 2.1.1 A: Urethra Step 2: Identify two parts that contribute to the formation of semen. Semen is composed of sperm and seminal fluid. Seminal fluid is produced by the seminal vesicles, prostate gland, and bulbourethral glands. 2.1.2 B and F (or B and G, or F and G) Step 3: Explain the consequence of wearing tight-fitting underwear on human reproduction. 2.1.3 Tight-fitting underwear increases the temperature of the testes. The testes need to be at a temperature slightly lower than body temperature for optimal sperm production (spermatogenesis). An increased temperature will inhibit or reduce sperm production, leading to a lower sperm count or abnormal sperm, which can result in reduced fertility or infertility. 3 done, 2 left today. You're making progress.