Line

Definition

A line is a long, narrow mark or band. In biology, it can refer to anatomical structures or markings that are linear in nature.

5 Must Know Facts For Your Next Test

1. The lateral line system in fish allows them to detect vibrations and movement in the water.
2. Lines of arrested growth (LAGs) are used to determine the age of reptiles and amphibians.
3. Vertebral lines, such as spinal lines, play critical roles in supporting and protecting the spinal cord.
4. Mammalian hairlines indicate fur growth patterns and can have implications for species identification.
5. The Linea alba is a fibrous structure running down the midline of the abdomen in many vertebrates.

Review Questions

• What function does the lateral line system serve in aquatic vertebrates?
• How are Lines of Arrested Growth (LAGs) useful in herpetology?
• Where is the Linea alba located, and what is its significance?

Related terms

Lateral Line System: A sensory organ found in fish and some amphibians that detects water movements.

Lines of Arrested Growth (LAGs): Rings found in bones that indicate periods of slowed growth due to environmental stressors.

Linea Alba: A fibrous structure along the midline of the abdomen providing attachment for abdominal muscles.