Drosophila melanogaster, also known as the fruit fly, is a widely used model organism for studying the development of the nervous system due to its short generation time, ease of genetic manipulation, and well-characterized developmental processes.

Danio rerio, also known as the zebrafish, is a commonly used model organism for studying the development of the cardiovascular system due to its transparent embryos, rapid development, and genetic tractability.

Mus musculus, commonly known as the mouse, is a widely used model organism for studying the development of the immune system due to its genetic similarity to humans, well-established immunological tools, and the availability of genetically modified strains.

Xenopus laevis, also known as the African clawed frog, is a commonly used model organism for studying the development of the reproductive system due to its large and easily accessible eggs, rapid development, and the ability to manipulate gene expression.

Gallus gallus, commonly known as the chicken, is a widely used model organism for studying the development of the respiratory system due to its accessible embryos, well-characterized developmental stages, and the ability to manipulate gene expression.

Drosophila melanogaster, also known as the fruit fly, is a commonly used model organism for studying the development of the digestive system due to its short generation time, ease of genetic manipulation, and well-characterized developmental processes.

Mus musculus, commonly known as the mouse, is a widely used model organism for studying the development of the musculoskeletal system due to its genetic similarity to humans, well-established genetic tools, and the availability of genetically modified strains.

Xenopus laevis, also known as the African clawed frog, is a commonly used model organism for studying the development of the integumentary system due to its accessible embryos, rapid development, and the ability to manipulate gene expression.

Mus musculus, commonly known as the mouse, is a widely used model organism for studying the development of the endocrine system due to its genetic similarity to humans, well-established genetic tools, and the availability of genetically modified strains.

Mus musculus, commonly known as the mouse, is a widely used model organism for studying the development of the urinary system due to its genetic similarity to humans, well-established genetic tools, and the availability of genetically modified strains.

Mus musculus, commonly known as the mouse, is a widely used model organism for studying the development of the lymphatic system due to its genetic similarity to humans, well-established genetic tools, and the availability of genetically modified strains.

Xenopus laevis, also known as the African clawed frog, is a commonly used model organism for studying the development of the reproductive system due to its accessible embryos, rapid development, and the ability to manipulate gene expression.

Drosophila melanogaster, also known as the fruit fly, is a widely used model organism for studying the development of the nervous system due to its short generation time, ease of genetic manipulation, and well-characterized developmental processes.

Danio rerio, also known as the zebrafish, is a commonly used model organism for studying the development of the cardiovascular system due to its transparent embryos, rapid development, and genetic tractability.

Mus musculus, commonly known as the mouse, is a widely used model organism for studying the development of the immune system due to its genetic similarity to humans, well-established immunological tools, and the availability of genetically modified strains.