Stages of Development - Aliya :) by Aliya Awad https://padlet.com/awadaliy/k4r9w803f1ufqubf The characteristics of development that occur in each of the stages of prenatal development. en-us 2020-08-05 01:11:26 UTC 2023-02-27 06:02:54 UTC hello@padlet.com https://padlet.net/icons/png/1f9ec.png Germinal Stage awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/669661682 0-2 weeks
Starts with fertilisation and ends with implantations (when a cluster of cells attach to the endometrium)]]> 2020-08-05 01:15:57 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/669661682 3-4 days after fertilisation awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672048906 After fertilisation, when there are about 16 cells, the zygote takes on a spherical shape and is now known as a morula.]]> 2020-08-07 02:28:06 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672048906 5 days after fertilisation awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672050480 The morula, which now has 64 cells, turns into a blastocyst. The inner mass of the blastocyst will become the embryo and the outer cell will become the placenta. ]]> 2020-08-07 02:30:07 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672050480 Implantation (7-12 days after fertilisation) awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672051591 When it reaches the uterus the blastocyst implants itself in the endometrium and becomes known as an ‘ embryo’.]]> 2020-08-07 02:31:46 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672051591 Formation of the placenta awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672052864 As soon as implantation begins the placenta starts to form.]]> 2020-08-07 02:33:32 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672052864 Summary diagram of Germinal stage awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672053937 2020-08-07 02:35:04 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672053937 Embryonic stage awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672054519 3-8 weeks
The most critical stage for human development.
This is the stage where specific cells start taking on their specialised roles. E.g.: Heart cells, skin cells, bone cells.]]> 2020-08-07 02:35:53 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672054519 Proximodistal development awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672056313 Proximodistal development occurs from the center or core of the body in an outward direction. 
This is usually evident in 30 - 50 day old embryos. ]]> 2020-08-07 02:38:19 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672056313 Formation of sex organs awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672056899 Although sex is determined at fertilisation, the internal sex organs begin to form during the embryonic stage but will not be complete for another eight weeks.]]> 2020-08-07 02:39:10 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672056899 Cepholocaudal development awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672059843 Cepholocaudal is head to foot development.
By the eighth week, the embryo becomes distinctly human looking, although the head and neck still account for half of the embryo’s total length and the brain makes up almost half of its body weight (cepholocaudal development)]]> 2020-08-07 02:43:00 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672059843 Placenta connects to baby awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672061641 At the end of the Embryonic stage, the embryo is 2cm and the placenta is connected to be able to send nutrients and provide for the next stage.]]> 2020-08-07 02:44:58 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672061641 Formation of brain and spinal cord awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672062542 Many of the internal and external organs and systems are formed during this stage, and the brain and spinal cord are almost complete by the end of it.]]> 2020-08-07 02:46:11 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672062542 Foetal stage awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672063880 9-40 weeks
This is the longest of the prenatal periods and lasts from the beginning of week nine, until the end of pregnancy
This period is time for extensive growth and development.]]> 2020-08-07 02:48:01 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672063880 Muscle, organs and nerves begin to function awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672065104 Although these were formed in the embryonic stage, they begin to start functioning]]> 2020-08-07 02:49:58 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672065104 Amniotic fluid awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672066343 The lungs of the foetus are filled with amniotic fluid, not air. ]]> 2020-08-07 02:51:54 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672066343 Fat deposits under skin awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672066687 This is to prepare the baby for the outside environment]]> 2020-08-07 02:52:27 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672066687 Placenta awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672067748 Placental expulsion begins as a physiological separation from the wall of the uterus. 
The period from just after the foetus is expelled until just after the placenta is expelled is called the third stage of labor. The placenta is usually expelled within 15–30 minutes of the baby being born.
]]> 2020-08-07 02:54:01 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672067748 Summary diagram of Germinal, Embryonic and Foetal stages awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672068343 2020-08-07 02:54:51 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672068343 BIRTH! awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672069472 Babies are considered premature if they are born 3 weeks before their due date.
A baby born after 24 weeks may survive with intensive care.
]]> 2020-08-07 02:56:35 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672069472 Details form awadaliy https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672070077 Sex identified at ultrasound
Eyebrows and eyelashes start to form.
Eyelids fused over.
Buds are created for the limbs.
Tooth buds form.]]> 2020-08-07 02:57:28 UTC https://padlet.com/awadaliy/k4r9w803f1ufqubf/wish/672070077