GERM LAYERS Flashcards
ORIGEN THE NOTOCHORD
MESODERM
WHO STIMULATE THE NEURAL PLATE TO BECOME THE NEURAL FOLD AND FINALLY NEURAL TUBE
NOTOCHORD
WHICH STRUCTURE COME FROM ECTODERM
EPIDERMIS
NERVOUS SYSTEM
THE REMMANT OF THE NOTOCHORD IN THE ADULT IS
NUCLEUS PULPOSUS OF SPINE
WHAT STRUCTURES FORM THE NEURAL TUBE
CNS - CENTRAL NERVOUS SYSTEM
- CNS NEURONS, OLIGODENDROCYTES
- RETINA
- SPINAL CORD
WHAT STRUCTURES FORM THE NEURAL CREST
PNS - PERIPHERAL NERVOUS SYSTEM
- CRANIAL NERVS
- DORSAL ROOT GANGLIA
- AUTONOMIC GANGLIA
- SCHWANN CELLS
- MENINGES
WHERE MICROGLIA (PHAGOCYTES) COME FROM
MESODERM
ENDODERM FORMS
GI EPITHELIUM AND DERIVATES
LIVER, GALLBLADDER, PANCREAS
ALVEOLI, EPITHELIUM OF TRACHEA / BRONCHI
ORIGIN AIRWAY CARTILAGE
MESODERM
WHAT FORMS THE MESODERM
MUSCLE, BONE, CONNECTIVE TISSUE
CARDIOVASCULAR STRUCTURES
KIDNEYS
LYMPHATICS
BLOOD
WHAT IS THE EMBRYONIC CONNECTIVE TISSUE
MESENCHYME
WHAT IS THE MOST VULNERABLE PERIOD TO TERATOGENS?
EMBRYONIC PERIOD - FIRST 8 WEEKS AFTER FERTILIZATION
ORGANOGENESIS OCCURS
IN WHAT WEEK THE HEART STARTS TO BEAT
WEEK 4
WEEK 6 - TRANSVAGINAL ULTRASOUND DETECTS FETAL HEART MOVEMENT
IN WHAT WEEK DEVELOPMENT THE LIMBS
WEEK 4 LIMBS FORM
WEEK 8 - BABY BEGINS MOVING ULTRASOUND
GENITALIA
PRIOR TO WEEK 10 GENITALIA LOOK SIMILAR FOR MALES AND FEMALES
SRY GENE – Y CHROMOSOME –PENIS DEVELOPMENT AROUND WEEK 10
LACK OF SRY GENE – CLITORIS DEVELOPMENT
ULTRASOUND IDENTIFICATION OF SEX > USUALLY WEEK 15 TO 20
WHERE THE PITUITARY GLAND COME FROM
ANTERIOR PITUITARY / ADENOHYPOPHYSIS /
FROM RATHKE S POUCH
SECRETES HORMONES LIKE ACTH, TSH
POSTERIOR PITUITARY / NEUROHYPOPHYSIS /
FROM NEURAL TUBE
SECRETES HORMONES LIKE ADH AND OXYTOCIN
WHERE THE ADRENAL GLAND COME FROM
CORTEX> MESODERM
SECRETES ALDOSTERONE, CORTISOL, ANDROGENS
MEDULLA > NEURAL CREST
SECRETES EPINEPHRINE, NOREPINEPHRINE
