Red blood cell

Summary: Red blood cells transport oxygen around the body. They contain haemoglobin. This is a red pigment that joins to oxygen. Unlike most animal cells, red blood cells do not have a nucleus. They are small and round and curve in on both sides. Their shape increases their surface area and helps them carry oxygen. Tags: science student-book-7 biology Created: 2026-05-21 Last Updated: 2026-05-21

Red blood cell

Red blood cells transport oxygen around the body. They contain haemoglobin. This is a red pigment that joins to oxygen. Unlike most animal cells, red blood cells do not have a nucleus. They are small and round and curve in on both sides. Their shape increases their surface area and helps them carry oxygen.

Source

This concept is from the [Science Student Book 7](Science Student Book 7/Biology/Cells/1.3 Specialized cells.md), Biology section.