Examlex
The morula is more developmentally advanced than the blastocyst.
Musculoskeletal System
The organ system that enables humans and other animals to move using the muscular and skeletal systems, providing form, support, stability, and movement to the body.
Spinal Cord
A long, thin, tubular structure made up of nervous tissue, which extends from the brain and is encased in the vertebral column.
Respiratory System
The biological system in animals consisting of specific organs and structures used for gas exchange between the organism and its environment.
Mesoderm
The middle layer of an embryo in early development, giving rise to muscles, bones, and the circulatory system.
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