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CureAllDenver

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prenatal development embryology human development biology

Summary

This document details the stages of prenatal development, from fertilization to birth. It also discusses factors affecting the process and the key body systems involved in pregnancy. The text covers ovulation, fertilization, zygote formation, and implantation, along with the subsequent stages of development.

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**BEGINNING OF LIFE** 1. **Ovulation- when your ovary releases an egg for fertilization. Fimbriae help guide the egg through your fallopian tubes towards your uterus. An egg can be fertilized by sperm.** 2. **Fertilization- the process where a sperm cell penetrates an egg in the fall...

**BEGINNING OF LIFE** 1. **Ovulation- when your ovary releases an egg for fertilization. Fimbriae help guide the egg through your fallopian tubes towards your uterus. An egg can be fertilized by sperm.** 2. **Fertilization- the process where a sperm cell penetrates an egg in the fallopian tube.** 3. **Zygote- a single cell that is formed when an egg and a sperm cell combine.** 4. **Blastocyst- a hollow ball of cells. The cells form two layers.** - **[Endoderm:] digestive and respiratory system** - **[Ectoderm:] skin and nervous system** - **[Mesoderm:] muscle and skeletal system** **PRE NATAL STAGE- period of development from conception to birth. Typically calculated as [40 weeks.]** **Pre- term: born before 37 weeks** **Post- term: born after 42 weeks** **STAGES OF PRE-NATAL DEVELOPMENT** 1. **Germinal (fertilization to 2 weeks)- zygote travels along the fallopian tube and eventually implant itself in the uterus wall. Also functions as protective in this stage.** 2. **Embryonic (2 weeks to 8 weeks)- formation of major organs that form the biological system.** 3. **Fetal (8 weeks to birth)- longest and final stage of pregnancy lasting until giving birth. Organs are highly developing and senses are becoming more functional.** **FACTORS AFFECTING PRE-NATAL DEVELOPMENT** - **Prenatal development- is the process of a baby growing in the mother's womb, from the time it's conceived until birth.** - **Pregnancy- period when a woman is carrying a developing baby inside her womb, typically lasting about nine months from conception to birth.** - **Pre-natal- The care and events that occur before the baby is born, during the pregnancy.** - **Threats to Pregnancy- things that can cause serious problems during pregnancy.** - **Miscarriage- loss of a baby before the 20th week of pregnancy.** - **Ectopic pregnancy- the fertilized egg (zygote) implants outside the uterus.** - **Complications associated with pregnancy- the body undergoes rapid hormonal and biological changes.** - **Bleeding- more significant and heavier** - **Spotting- usually involving small amounts of blood** - **Maternal Context- The characteristics and the readiness of the mother's biological system.** - **Medical Related Concerns- The kinds of medication the mother has taken before and during pregnancy can possibly cause deformities, delayed development, and fatality.** - **Environmental Factors- amount of social support by the immediate environment can affect the quality** **of pregnancy experienced by the mother.** - **Other factors- quality of sperm** **The Body Systems** - **Endocrine System- affects the under secretion or over secretion of certain hormones that can have an immediate, long-term, and short-term effect on the person. In charge of the production of different hormones in the body.** **4 MAJOR GLANDS** **1. Pituitary Glands- growth hormones; somatotropin (natural), somatropin (injection)** **2. Thyroid Gland- thyroxine (brain development)** **3. Adrenal Gland- aldosterone (keeps the salt and water balance), cortisol (essential for growth of an unborn baby), adrenaline (fight or flight response)** **4. Gonads- testosterone, estrogen and progesterone** - **Nervous System- controls the full functioning of the other body system. Affects a person\'s behavior depending on the trajectory of brain development.** **2 MAJOR SYSTEMS** - **Central Nervous System- Brain and spinal cord, responsible for controlling major activities and responses.** - **Peripheral Nervous System (PNS): Connects the CNS to the rest of the body, receiving and sending signals.** **1. Somatic Nervous System- transmits sensory and motor signals to and from the central nervous system. Things you can consciously send and do.** **2. Autonomic Nervous System- controls the function of our organs and glands. Regulates involuntary physiologic processes including heart rate, blood pressure.** - **Sympathetic- responding to dangerous or stressful situation.** - **Parasympathetic- normal functioning under relaxed conditions.** - **Brain Development** - **Synaptogenesis: Increase in neural connections facilitating sensory information (conception to infancy.** - **Lateralization: Specialization of the hemispheres---left (language) and right (spatial/creative).** - **Adolescent Brain Development** - **Prefrontal lobe- which is responsible for critical and reflective thinking. Full prefrontal lobe development leads to better impulse control and decision-making.** - **Brain Changes in Late Adulthood- Decrease in brain cells affects:** - **Mental processing** - **Motor coordination** - **Memory and recall** - **Physiological functions, potentially leading to illnesses.** **Physical Development Across Stages** 1. **Infancy- demonstrate their early communication through reflexes, which are automatic responses to stimuli that ensure survival.** - **Sucking reflex** - **Grasping reflex** - **Babinski reflex- foot sole** - **Moro reflex- startled** - **Rooting- locate a food source** 2. **Childhood** - **gain more control over motor functions, such as balance.** - **muscular coordination improves** - **sensory systems also become more advanced.** 3. **Adolescent** - **Boys: starts at 12, peaking 14** - **Girls: starts at 10, peaking at 12** - **characterized by a growth spurt, and boys and girls develop at different times.** - **hormones trigger physical changes, including maturation of sexual organs and increased muscle mass and height.** - **Grapple with psychological challenges, such as concerns about body image and identity.** 4. **Adulthood** - **individuals reach their peak physical capabilities, typically in their early 20s.** - **Strength, endurance, and agility are at their highest** - **in the 60s, as the body loses the ability to engage in prolonged physical activities.** - **middle adulthood, women experience menopause** - **sperm production decreases with age, affecting fertility** **Parental Contributions** A. **Parental Attitude and Knowledge** B. **Parental Cultural Influences** C. **Socioeconomic Barriers** D. **Pedagogical Implications** **Psychosocial Opportunities** - **Social Interaction- Positive relationships can promote confidence** - **Emotional Well-being- Positive social interactions and emotional support can foster feelings of security, self-worth, and motivation.** - **Motivation and Encouragement** - **Managing Stress** **Physical Environment** - **non-social aspects of one\'s environment, such as but not limited to, the place where one lives and the accompanying materials within it.** **Nutritional Knowledge and Practices** - **Health- the overall physical and mental well-being of an individual. It encompasses the absence of disease, illness, or injury, as well as the ability to function and adapt to various situations.** - **Nutrition- the process by which the body uses food to build, maintain, and repair tissues.** - **Go- carbohydrates like rice, bread, potatoes** - **Grow- protein like meat, eggs, beans** - **Glow- minerals and vitamins found in foods like milk** **Research Integration** - **Effect of yoga or physical exercise on physical, cognitive and emotional measures in children: a randomized controlled trial** - **Balkrishna, A. et. al.** - **Physical exercise- higher social self-esteem. Increase in body mass.** - **Yoga- cognitive and emotional**

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