Tag: lumbar vertebra

Explore the fascinating anatomy of the amphibian heart, a crucial adaptation for animals transitioning between aquatic and terrestrial environments. This article delves into the unique three-chambered structure, highlighting how it efficiently manages both oxygenated and deoxygenated blood flow. Understand the intricate system that allows amphibians to maintain their metabolic needs while utilizing both pulmonary and cutaneous respiration.

Explore the intricate anatomy of the human right hand through a deep dissection, revealing the complex interplay of bones, muscles, and ligaments from an anterior (palmar) view. This comprehensive guide highlights key structures, including the carpal bones, metacarpals, phalanges, and the critical carpal tunnel, essential for understanding hand function and common medical conditions. Gain valuable insights into the sophisticated biomechanics that enable the hand's remarkable dexterity and strength.

Explore the remarkable growth and developmental milestones of the sperm whale (Physeter macrocephalus), the largest toothed predator on Earth. This article delves into the distinct size differences between males and females across various life stages, from newborn to exceptionally large adults. Understand the incredible anatomical and physiological journey of these deep-diving cetaceans.

Explore the intricate world of early avian development through the dorsal view of a 33-hour chick embryo, revealing the nascent structures of the brain, spinal cord, and somites. This article dissects the foundational anatomical changes occurring within the first two days of incubation, offering insights into the rapid organization of a vertebrate body plan. Discover how the primitive streak, neural folds, and somites orchestrate the initial stages of organogenesis.