11th Biology Chapter 7

Organ and Organ System

The complexity of organ systems showcases discernable evolutionary trends. Organs are built from basic tissues that form through coordination to improve efficiency and functioning in multicellular organisms【4:1†source】.

Frogs: Morphology and Anatomy

Frogs, as amphibians, display characteristics like variable body temperature and mimicry for survival. This section covers the external and internal structures of frogs, emphasizing their adaptations for both terrestrial and aquatic environments【4:0†source】.

Digestive System of Frogs

Frogs have a compact digestive system fitting their carnivorous diet, with organs such as the stomach, liver, pancreas, and a short intestine adapted for efficient digestion and nutrient absorption【4:2†source】.

Respiratory System of Frogs

Frogs utilize cutaneous respiration in water and pulmonary respiration on land. The skin, buccal cavity, and lungs serve as respiratory organs adapting to their dual environments【4:2†source】.

Circulatory and Lymphatic System

A well-developed vascular system with a unique three-chambered heart, blood vessels, and a lymphatic system that includes lymph, lymph channels, and lymph nodes, supporting nutrient and gas transport throughout the body【4:3†source】.

Excretory and Reproductive Systems

The excretory system featuring kidneys, ureters, and cloaca, is adept at handling metabolic waste, whereas the reproductive system involves external fertilization and distinct sexual dimorphism in structure【4:6†source】.