The cap-like acrosome at the anterior of a human sperm head is important because it contains:

1. The sperm head has a cap-like structure called the acrosome at its front. 2. The acrosome contains the enzyme hyaluronidase. 3. This enzyme helps the sperm enter the ovum during fertilization. 4. Mitochondria for energy and centrioles are in the middle piece/neck, not the acrosome, so they are wrong. 5. The head is mostly condensed nucleus and the sperm carries little cytoplasm, so the yolk-storage option is ruled out. 6. Hence the acrosome's hyaluronidase is the key to ovum penetration, unlike the other parts. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 17 Reproduction in Plants and Animals "Structure of Human Sperm", p.257_