Podcast
Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App
Questions and Answers
¿De qué capa del embrión se origina la epidermis?
¿De qué capa del embrión se origina la epidermis?
- Cresta neural
- Mesodermo lateral de la placa
- Ectodermo superficial (correct)
- Endodermo
¿Qué células en la epidermis producen melanina?
¿Qué células en la epidermis producen melanina?
- Células granulares
- Células germinativas
- Melanocitos (correct)
- Células escamosas
¿De qué células se origina la dermis?
¿De qué células se origina la dermis?
- Células nerviosas
- Células del sistema inmunológico
- Células epiteliales
- Células mesenquimales (correct)
Flashcards are hidden until you start studying
Study Notes
- The skin has a dual origin: the epidermis from the superficial ectoderm and the dermis from the underlying mesenchyme.
- The epidermis develops layers: basal/germinative, spinous, granular, and cornified.
- Melanocytes in the epidermis produce melanin, which gives pigmentation to the skin, hair, and nails.
- The dermis originates from three sources: mesoderm of the lateral plate, paraxial mesoderm, and neural crest cells.
- The dermis contains sensory nerve organs and papillary projections that extend into the epidermis.
- Hair develops from solid epithelial proliferations that penetrate into the dermis and form hair papillae.
- Sebaceous glands secrete sebum into hair follicles and onto the skin.
- Sweat glands are exocrine and form from yemas in the germinative layer of the epidermis.
- Mammary glands are modified sweat glands that develop from thickened epidermal bands and produce milk after puberty.
- Hormones stimulate branching of mammary ducts to form alveoli.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
